Shape & Size of shaft 

Bahut sundar se batate hai sir aap,,🙏

Very nice

Bahut badiya sir ... thanks 🙏

Good topic sir

🙏🙏🙏🙏

Nice topics

good topic

Thank you sir.🙏

Sir DJ Deshmukh ka important topics ko karwadijiye

🙇

Sir aap hmlog ko online classes de sakte hai mining engineering 1st year students (diploma) please sir

Nice 👍👏thnq sir 🙏😍

Sir circular k fencing wle topic pe lijiye class

Very nice sir ji thank you so much

Access to mineral deposits me .entry mode v karwa dijiye sir g

Sir 30 m ki under me ore body hoga to o.c.p kar sakte ha, magar incline or shaft kiu karta ha

Chirimiri R6 mine adit hai sir ji

Nice topic sir DJ Deshmukh ka ek topic cover hogya

🙏🙏🙏

Video of lining

Sir whatsapp group ka link send kriye please 🙏🙏

Sir ye diameter of shaft 4.2 and 6.7 accurate hai kya

Temporary, permanent lining and method of sinking shaft