Тёмный

Stronger Than Steel! Easily Repair Broken Plastic With 1.5V Battery 

Gaus DIY
Подписаться 66 тыс.
Просмотров 1,8 млн
50% 1

Hello everyone! You are watching video " Stronger Than Steel! Easily Repair Broken Plastic With 1.5V Battery"
I hope you enjoy watching my video!
► Subscribe: youtube.com/@GausDIY?sub_confirmation=1
On Gaus DIY channel, you can learn various inventions, tips, science projects, crafts idea and DIYs teaching how to reuse or recycle.
© Copyright by Gaus DIY ☞ Do not Reup

Хобби

Опубликовано:

 

29 янв 2024

Поделиться:

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист
Посмотреть позже
Комментарии : 502   
@victorlgcarvalho
@victorlgcarvalho Месяц назад
He fixed the plastic part and got cancer in the process.
@pacucoreyes7268
@pacucoreyes7268 Месяц назад
😅
@nickc8819
@nickc8819 Месяц назад
😂pretty much
@joeldrummer81
@joeldrummer81 Месяц назад
Debio usar guantes
@jandcbikes4068
@jandcbikes4068 Месяц назад
🤣🤣🤦🏾‍♂️🤦🏾‍♂️
@RHYMESMOKE1
@RHYMESMOKE1 Месяц назад
😂 ☠️
@davidbubb5108
@davidbubb5108 2 месяца назад
Break up a soldering iron to make a soldering iron , guys a genius
@contour157
@contour157 2 месяца назад
gotta pad that time
@alexxander7289
@alexxander7289 Месяц назад
Battery powered not AC
@michaeljames8329
@michaeljames8329 Месяц назад
I've seen several operations similar to this that simply used a flat bolt - instead of destroying a perfectly fine soldering iron...
@KevinDeen-cx2ss
@KevinDeen-cx2ss Месяц назад
The only positive part was how to repair a soldering iron.
@noquedaniuno
@noquedaniuno 28 дней назад
The soldering iron was already broken and with this he make it work with 12v DC, don't get me wrong, the "repair" was not good at all, but making an 12v DC Iron that heats up so fast can make a very convenient tool for a mechanic... soldering wires in a car directly from the battery or any live wire even. I think there's something here
@zedixe13
@zedixe13 2 месяца назад
Repair ABS with ABS , just melt some scrap ABS bits in acetone or MEK and pour it in that’s all folks
@aliyahu76
@aliyahu76 Месяц назад
Or just order a new one.
@barthoebergen4631
@barthoebergen4631 Месяц назад
No you need not mek or acetone, dichloromethane because that will get the melecule structure back in place or something like that. I know that mek and acetone work but not as good as dichloromethane
@pierluigitonegato2307
@pierluigitonegato2307 Месяц назад
yes, but remember to use all the safety precautions, as dichloromethane is carcinogenic.
@erichill7560
@erichill7560 28 дней назад
@@pierluigitonegato2307 In for a penny, in for a pound!
@556guy4
@556guy4 2 месяца назад
He didn't use primer first. You can see the repair.
@mrtlm7024
@mrtlm7024 Месяц назад
I can’t believe I clicked on this
@kurtilingus
@kurtilingus 26 дней назад
Lol, I'm glad I skimmed these comments before making the same mistake. Def "useless bullshit clickbait" vibe here
@Blackadam01
@Blackadam01 2 месяца назад
I scoured YT looking for a way to fix cheap plastic and found some good one’s. But I kept asking myself is there a video that teaches me to fix cheap plastic AND will increase my risk of getting cancer too? Well here it is!
@aliyahu76
@aliyahu76 Месяц назад
How about, "it's better to just buy a new lense?'
@HansDelbruck53
@HansDelbruck53 Месяц назад
@@aliyahu76 That's not a lens.
@Anarchy-Is-Liberty
@Anarchy-Is-Liberty 28 дней назад
@@aliyahu76 Don't forget to change your headlight fluid and filter regularly!! ROFLMFAO!!
@1936Studebaker
@1936Studebaker 2 месяца назад
Fibreglass & body filler, much simpler, playing with any type of battery contents is not smart!
@shanehayden4480
@shanehayden4480 2 месяца назад
Fiberglass don't stick to plastic buddy
@Brakzillaa
@Brakzillaa 2 месяца назад
​@@shanehayden4480 rough up the merging points with some 60grit, and it will, noob.
@MarkSmith-xi3vl
@MarkSmith-xi3vl Месяц назад
Baking powder n super glue. Easy peasy
@alexxander7289
@alexxander7289 Месяц назад
Just carbon.
@mryoung8586
@mryoung8586 2 месяца назад
I love the glow plug hack. Otherwise, the battery thing was a waste of time
@alexxander7289
@alexxander7289 Месяц назад
U wouldn't want to hold that thing if it wasn't battery powered
@user-gp8ox8fx5s
@user-gp8ox8fx5s 26 дней назад
He only insulated one wire
@davidgoldstein770
@davidgoldstein770 2 месяца назад
I want those 11 1/2 minutes back
@iamjd_7960
@iamjd_7960 2 месяца назад
Saved me 11 minutes, cheers 🍻
@GrimrprO13
@GrimrprO13 2 месяца назад
Thank you for the heads up! You are doing the Lords work
@middlecovemotors2474
@middlecovemotors2474 2 месяца назад
It was valued utube toilet time saved for me
@lignumzygophyllaceae3820
@lignumzygophyllaceae3820 2 месяца назад
Thanx for the heads up...im out!!
@RobPento
@RobPento 2 месяца назад
I ffw'd to min 8, based on ur input. Also, why use the innards of a battery versus another powered substance? Poor video, and you saved us 😊
@rjb6327
@rjb6327 2 месяца назад
I think, I would just go out and buy a part from the junk yard and repaint it.
@FernandoValcarcel
@FernandoValcarcel 2 месяца назад
Sometimes the parte does not exists, or junkyards does not hace it.... Knowing to weld plastic helps me on My work, i do notebooks repairs, plastic breaks and some parts are not easy or cheap to find... Also is very relaxing and satisfaying. Sometimes yo can "improve" the design to Make it stranger... Someone is sharing knowledge, appreciate that
@alexxander7289
@alexxander7289 Месяц назад
Yes but really with the prices of today's inflation this is cheaper
@JohnDoe-gi1vr
@JohnDoe-gi1vr Месяц назад
That is a better option. The bumper will crack later with the sun
@izzyram31490
@izzyram31490 Месяц назад
😂😂😂
@izzyram31490
@izzyram31490 Месяц назад
😂😂😂
@watchdogu.s.a.8973
@watchdogu.s.a.8973 27 дней назад
There sure are a lot of mean, hateful people who take the time to watch videos just so they can try to tear someone down. You know... you don't HAVE to watch this type video. This was my first time seeing this person's channel. While I know some and can think of other ways of repairing plastics and other materials, this video gave me some good ideas. I'm not too sure I'll be taking batteries apart but I'm pretty sure I'll be converting an old soldering as he did here. Instead of tearing someone down... learn from what they do and apply any little part or all to a project. If you've never repaired anything I encourage everyone to learn to fix something... anything. It will give you a great sense of accomplishment. Sure, you can spend the money to just buy new... IF a new part is available or even used if available... but that spends your money that could be used for something plus it robs you of that satisfaction in knowing you were able to actually repair your item. This doesn't just apply to broken things like this. Learn to fix a toaster, a lamp, anything... rather than paying someone to do it or buying a new one. Many things are very simple to repair. Build others up rather than try to destroy them. You'll be a better person for it. NOTE: With all that said, there ARE some people and videos on RU-vid that should be called out for encouraging extremely dangerous things.
@geoffdobbin9512
@geoffdobbin9512 Месяц назад
Use the metal mesh and silver tape and cover it with JB WELD job done.
@RemkoNHN
@RemkoNHN 2 месяца назад
Don't play with batteries kids! I like the glow plug!
@carloscollomps1552
@carloscollomps1552 2 месяца назад
The glow plug idea is in fact really nice. Battery powder? No, it should be sodium bicarbonate, as high ph is needed to make a stronger bond. That's even used in Boeing B52's wing spars.
@bettersalute
@bettersalute Месяц назад
So baking soda in laymen's terms
@Anarchy-Is-Liberty
@Anarchy-Is-Liberty 28 дней назад
@@bettersalute No, in "laymen's terms" it would just be called "that one stuff".
@asaco4439
@asaco4439 2 месяца назад
very good trick, just one catch. You failed when painting the red, it always lightens the paint and doesn't cover well. The trick is to paint a little white on top of the black patch and then red and it will look perfect. It works for yellow orange etc. greetings
@Rabbit.760
@Rabbit.760 Месяц назад
Sealer works too
@quigz125
@quigz125 29 дней назад
Well there’s 9 minutes of my life I’m never getting back…
@znf3272
@znf3272 2 месяца назад
…¿Tienes algún video donde tritures uralita o rompas unos cuantos termómetros de mercurio para reparar algo? ¿No sé, un poquito de Polonío para reparar un movil? ¿O carbono 14 para pintar a carboncillo???
@edwinvallarino
@edwinvallarino 2 месяца назад
Jajajajajajajaja el mejor comentario, lo triste es que hay gente que mira esto y lo quiere hacer
@christophehardouin2430
@christophehardouin2430 2 месяца назад
😂
@rodrigotv9934
@rodrigotv9934 Месяц назад
Es una burrada lo que hace y la forma de aplicarlo peor… pobre organismo ojalá no se enferme
@romancturner
@romancturner 28 дней назад
😂😂
@Tenaciousmojo
@Tenaciousmojo 2 месяца назад
his wife gonna be pissed about the kitchen table
@tokoname19790803
@tokoname19790803 2 месяца назад
ナルホド、こんな補修方法があるとは知りませんでした、勉強になります^^ 塗装ですがサーフェイサーで下塗りしたら下地が綺麗に隠れて綺麗に塗れると思います^^d
@D-M-W
@D-M-W Месяц назад
Top class creative ideas. Amazing ideas when the human brain is used for something creative. Salute to you superman.
@Phaota
@Phaota 2 месяца назад
Why use the powder from the battery when baking soda mixed with graphite powder or styrofoam used with the liquid form of Super Glue would work just as well?
@Dromarius
@Dromarius 2 месяца назад
To die after 3 years of using this tuto ;) Next one would be how to purify your body with acid !
@HAL900032
@HAL900032 2 месяца назад
its a way of recycling old batteries in ass countries😅
@iantalmadge3410
@iantalmadge3410 2 месяца назад
Great job and excellent tip! Only thing I'd do different that you left out was Primer! Use primer so the dark spots don't shine through :) . Have a great day
@GausDIY
@GausDIY 2 месяца назад
Thank you Bro! Have a great day!
@CreativeHop-ds8ns
@CreativeHop-ds8ns 17 дней назад
Repairing broken plastic your way is very cool and very useful
@TheHighBrew
@TheHighBrew 2 месяца назад
Man. I love getting high and watching this stuff. It's amazing. Keep it up dude!
@kenny9490
@kenny9490 Месяц назад
Bet you could get high doing this stuff 😂
@kevimely7410
@kevimely7410 Месяц назад
Best laugh i ve had all day high brew 🤣🤣🤣
@antoniodragonetti8533
@antoniodragonetti8533 Месяц назад
¡Excelente....! ¡Muchas gracias!
@GausDIY
@GausDIY Месяц назад
Thank you so much!
@foxisretrofitting4556
@foxisretrofitting4556 Месяц назад
Glowplug hack was pretty smooth. Melting in the metal wire backing is nice. For rigid plastics I've always just put duct tape on one side of the hole and then used body filler to fill it level. After curing I just sand it and then use body filler or glazing compound to fill any imperfections left. A coat of white and then your color and you're done.
@GausDIY
@GausDIY Месяц назад
Thank you for the useful information! Wishing you and your family happiness and peace!
@dexmarkovic899
@dexmarkovic899 2 месяца назад
OK, I just think that the battery thing is superfluous. You can use almost anything else finely ground, such as wood chips. Then the paint could cover it better
@jonskitch8082
@jonskitch8082 2 месяца назад
Primer?
@PaoloAlghisi
@PaoloAlghisi 29 дней назад
la soggettività del concetto di "facilmente" nei titoli dei filmati DIY.....
@pharaohalberts4731
@pharaohalberts4731 29 дней назад
With thanks to California Insurance Commissioner Ricardo Lara for a job well done.
@perkins1439
@perkins1439 2 месяца назад
If you had used primer first the black spot wouldn't show through
@asafloml1-asaf-yaari
@asafloml1-asaf-yaari 24 дня назад
Amazing job...!!!
@GausDIY
@GausDIY 23 дня назад
Thank you so much 😀
@OscarOses-vh3us
@OscarOses-vh3us 2 месяца назад
Buena reparación me gusta exelente
@joepinto509
@joepinto509 2 месяца назад
Better off spending 3.99 on permatex 5 min plastic weld epoxy...sand the surface area with 40-80 grit paper then put tape on the back side of that plastic and apply that epoxy on it let it cure for an hour then sand it then apply a thin coat of bondo sand it prime it sand it again unit no sand marks are there then paint it . Comment from a 45 year vet in autobody and painting and customization ...
@rosarioimprota481
@rosarioimprota481 3 месяца назад
Very good
@GausDIY
@GausDIY 3 месяца назад
Thank you Bro
@dkllhholjlzd
@dkllhholjlzd Месяц назад
Pro: Muy efectivo y queda excelente. Contra: Muy trabajoso.
@user-et3fd4bd4i
@user-et3fd4bd4i 2 месяца назад
대한민국 경기도 에서 이른아침에 집에 누워 영상을 보고있습니다 😊
@user-zj9de2pi6i
@user-zj9de2pi6i Месяц назад
Excelente 👌
@Nightcrawler__01
@Nightcrawler__01 22 дня назад
Bro I can see the tape and filler metal piece but you can literally use body filler for that and do the same exact thing minus the super glue. Let it cure bud and there yah go....
@user-vk8cq1sx9w
@user-vk8cq1sx9w Месяц назад
日本からです。 今どきはグロープラグを交換して使うことも知らない人が多そうで、冒頭のそこから感心しました。
@vdev9081
@vdev9081 2 месяца назад
Muy útil. Gracias
@GausDIY
@GausDIY 2 месяца назад
Ok Bro, Thank
@TheMancalorian
@TheMancalorian 26 дней назад
Very clever but i could still see the square patch through the paint, I would have primered it then sprayed for a proper finish.
@Doc.wormington
@Doc.wormington 8 дней назад
I just shocked my self!!!
@mohamedounassar1537
@mohamedounassar1537 Месяц назад
Great
@DanielCastilloYLuna
@DanielCastilloYLuna 3 месяца назад
Muy bueno. Saludos
@Filippo-cc6xk
@Filippo-cc6xk 24 дня назад
Genova, Italia
@user-pb4tk5uh4n
@user-pb4tk5uh4n 2 месяца назад
修理部の黒が浮くので下地を黒か白に塗るべきでは?
@edgardovidalleyvafont982
@edgardovidalleyvafont982 2 месяца назад
Desde Holguin,Cuba
@michiganmagneto
@michiganmagneto 2 месяца назад
Just go buy a new soldering iron.
@alexxander7289
@alexxander7289 Месяц назад
$100+ or diy for $20
@user-pt7xp7yz2i
@user-pt7xp7yz2i Месяц назад
@@alexxander7289 у нас паяльник стоит 2$ а за 20$ можно почти паяльную станцию купить
@seanweiss6729
@seanweiss6729 Месяц назад
Should sand in a x pattern not just diagonal. This can also be done probly half the time with super glue and baking soda
@juanpabloserranoquispe48
@juanpabloserranoquispe48 2 месяца назад
Excelente maestro desde lima peru
@GausDIY
@GausDIY Месяц назад
Muito obrigado! Tenha um bom dia! ❤️❤️❤️
@sergiomolinatorres6755
@sergiomolinatorres6755 2 месяца назад
Soy De Matehuala San Luis Potosi
@lifehackofficial1
@lifehackofficial1 2 месяца назад
My channel is all about health and longevity. Taking apart batteries is not safe to do, especially without wearing gloves. Baking soda will work just as well and is safe.
@makeitsonumberone1358
@makeitsonumberone1358 2 месяца назад
No primer 🤨
@AmazingSmart-ngth
@AmazingSmart-ngth Месяц назад
"Amazing tutorial! It's incredible how you can repair broken plastic so easily using just a 1.5V battery. A real lifesaver for DIY enthusiasts!"
@GausDIY
@GausDIY Месяц назад
Ok! Glad you liked it!
@mrchevbowtie4933
@mrchevbowtie4933 Месяц назад
Good job , great ideas , ⭐️⭐️⭐️⭐️⭐️
@GausDIY
@GausDIY Месяц назад
Glad you like them!
@danb659
@danb659 26 дней назад
Whats the reason to put the oil on? Wont that stop the repair bonding properly?
@victorlee5208
@victorlee5208 Месяц назад
Looks flammable
@stevesedgwick5789
@stevesedgwick5789 2 месяца назад
Nice job!
@GausDIY
@GausDIY 2 месяца назад
Thank you so much!
@kluper1157
@kluper1157 Месяц назад
Needed a prime coat! great job! harbor Freight has a plastic repair kit without destroying your Soldering Iron
@GausDIY
@GausDIY Месяц назад
Thanks for the tip!
@felipegonzalocastroastudil7121
@felipegonzalocastroastudil7121 24 дня назад
bueno amigo
@SMARTFLOW4YOU
@SMARTFLOW4YOU Месяц назад
Столько ненужных телодвижений. Может проще было бы использовать эпоксидную смолу?
@carlossantiago7852
@carlossantiago7852 Месяц назад
Wasn't it easier safer using a working soldering and heavy duty epoxy to fill-up the mesh an the hole?🤷🏻‍♂️
@chinaUA
@chinaUA 14 дней назад
Ты бы ещё ураном это место засыпал...
@MAMEMA80
@MAMEMA80 3 месяца назад
افكار بالفعل رائعة ومفيدة جزاكم الله كل خير (محمد من الجزائر)
@balboa8694
@balboa8694 3 месяца назад
Saludos Mustafá
@andrewpowers7034
@andrewpowers7034 2 месяца назад
JB Weld much simpler
@user-gp8ox8fx5s
@user-gp8ox8fx5s 26 дней назад
Grind up some plastic instead of messing around with batteries. Hell, you could soak any kind of dust with super glue.
@bry20235
@bry20235 2 месяца назад
Great method greetings from uk 🇬🇧
@GausDIY
@GausDIY 2 месяца назад
Thank you! Cheers!
@kamalsaber1065
@kamalsaber1065 Месяц назад
تحياتي من مصر أفكار رائعه جدا ومفيده جدا جدا جدا ❤
@GausDIY
@GausDIY Месяц назад
أنا سعيد جدًا لأن الفيديو مفيد، أتمنى لك ولعائلتك السلام والسعادة ❤️❤️
@krisowler367
@krisowler367 5 дней назад
Wouldnt just baking soda and superglue be much easier ? Cheaper ? Faster ? Or super glue and graphite ? Or super glue and cigarette ash ? Or super glue and pulverized charcoal ?
@Daniel-ml3gt
@Daniel-ml3gt 3 месяца назад
I'm from Montevideo, Uruguay. Thank you.👌
@GausDIY
@GausDIY 2 месяца назад
Hello Bro, Nice to meet you!
@JMVD48
@JMVD48 2 месяца назад
Good job, nice video. 👍
@GausDIY
@GausDIY 2 месяца назад
Thank Bro! Nice to meet you!
@rickjohnson803
@rickjohnson803 2 месяца назад
Awesome hack! Greetings from argentina!!
@GausDIY
@GausDIY 2 месяца назад
Hi friend! Thank you!
@pierogrullio8392
@pierogrullio8392 8 дней назад
Únicamente interesa si por casualidad tienes un soldador roto. Hay un montón de maneras de reparar el agujero con rapidez y sin quemarte los dedos
@viejosviajerossusiycarlos1827
@viejosviajerossusiycarlos1827 2 месяца назад
Muy bueno, pero yo usaría guantes porque la batería es muy contaminante.
@lazarorolon3297
@lazarorolon3297 2 дня назад
Mucho más fácil con baking soda y Krazy Glue
@Cerdutex
@Cerdutex 2 месяца назад
You dont need to put a metal mesh, that comb of crazy glue and carbon powder does a really good job.
@harbottle8580
@harbottle8580 Месяц назад
Super glue, talcum powder and cotton wool balls does exactly the same thing. Talcum powder gives a smooth outer finish. Cotton wool gives solid foundation behind it. All bonded by the super glue.
@al3w1s4ascycles
@al3w1s4ascycles 2 месяца назад
Bravo well done
@tommylee7646
@tommylee7646 18 дней назад
👍
@GausDIY
@GausDIY 18 дней назад
👍
@pethomas1223
@pethomas1223 29 дней назад
People still waiting to see the part of this that's "easy"...
@stevenlimbach3827
@stevenlimbach3827 Месяц назад
Why not just repair with a piece of the same plastic ? MUCH easier !
@lorettamoulpied5293
@lorettamoulpied5293 28 дней назад
Because this takes longer, more ad revenue.
@colinblick8946
@colinblick8946 2 месяца назад
I was with you up to the glow plug……P40 afterwards would have sorted it 🤷🏻‍♂️
@Thisismetman
@Thisismetman 2 месяца назад
You could buy the part for the cost of all the equipment.
@psychokillah87
@psychokillah87 2 месяца назад
Decent quality repair 👍
@alcidesduarte1326
@alcidesduarte1326 3 месяца назад
Genial !!! Muchas gracias!!
@paulf2898
@paulf2898 2 месяца назад
If macgyver did fairing repairs 😂
@user-zs4it5ew3z
@user-zs4it5ew3z 2 месяца назад
멋져요! 인두개조에 90점
@naporosales2062
@naporosales2062 Месяц назад
Todo lo has hecho bien ,me gustaría que pegaras el agarradera de las tijeras, que se ven como de plástico, yo ya probé con diferentes pegamentos y siempre se rompen, sería un reto para usted, son tijeras para cortar tela, en el momento que se pegan se sienten masisas ,pero se rompen.saludos.
@SoulImpact653
@SoulImpact653 Месяц назад
Hey from Germany. so cool your Video 😊
@Sexy_Inventor
@Sexy_Inventor 4 месяца назад
Liked and subscribed. This make me remember when I didn't have a solder gun, then I used to put a metal piece into fire to repair broken plastic at home.
@GausDIY
@GausDIY 4 месяца назад
Thank you!
@rivasjuan5336
@rivasjuan5336 2 месяца назад
Hermano me encanto el video, me. Gustaría saber como consigo esa pieza que le colocaste para calentar más rápido
@augustoyafusco2771
@augustoyafusco2771 2 месяца назад
Te sirve cualquier tubo de bronce, hace años que uso este truco, y el bicarbonato, es mejor y menos toxico que usar una pila
@fucxstixs316
@fucxstixs316 Месяц назад
You can use household baking soda as a catalyst with super glue as well, less toxic than cutting open old alkaline batteries.
@Machaconalejandro
@Machaconalejandro 2 месяца назад
Excelente 🎉🎉🎉❤
@GausDIY
@GausDIY 2 месяца назад
Thank you Bro!
@salvaricos5357
@salvaricos5357 Месяц назад
Que marca de pegamento usas?
@andrewgrace4410
@andrewgrace4410 2 месяца назад
What is the solution you dripped on the aluminum foil and the battery dust mixture?
@rickyb6086
@rickyb6086 Месяц назад
I believe it is super glue.
@scootergem
@scootergem Месяц назад
looks kinda sketchy to me, especially the soldering iron bit, just use a bit of flat bar with wooden handle and heat with a torch - even a vape torch will work. instead of the carbon stuff from a battery try baking soda or baby powder.
@JorgePerezRodriguez-bi1wb
@JorgePerezRodriguez-bi1wb 28 дней назад
Lo único bueno de este video son los comentarios. Me he partido de la risa.
@danieljl3115
@danieljl3115 2 месяца назад
Lo de la bujia de incandescencia no lo veo,la sección del cable tan fina tardará poco en quemarse,si no se quema antes la bujia por sobrecalentamiento
@moreandroidr.3893
@moreandroidr.3893 2 месяца назад
Con todo lo que tuve q utilizar soldador, bujía, malla, cable etc. Me salio más costoso el arreglo que el articulo
@sert5137
@sert5137 Месяц назад
เศษ ที่ตัดออก ไมไใ นำใา ฟอก เชื่อม
Далее
These 13 secret ways let you open any lock
15:25
Просмотров 18 млн
Я Не Спал 100 Часов!
00:39
Просмотров 30 тыс.
Having learned this Secret, I do Not Throw Gas Can
12:23
I turn a Nut into a tiny Adjustable Wrench
10:19
Просмотров 12 млн