How much do you know about O-rings? 

【My blog】
vipar6.com/
【Related page in my blog】
Fundamental knowledge about O-rings
vipar6.com/o-rings-en/
It’s interesting that O-rings are widely used but people don’t care about the details.
How does this simple part work to stop fluid?
Is it okay if we easily use O-rings since O-rings are simple parts?
The theme of this article is “to learn fundamental knowledge about O-rings”.