Do you always wear protective masks for argon arc welding at all times?
Argon arc welding together arc, infrared ultraviolet rays are tens of thousands of times the sun, without wearing protective masks, instantly dark
The class leader's statement is wrong. The arc welding arc is intense, and it radiates badly. Labor protection is necessary
There is no need to use weapons to fight zombies, and the end will be recorded with the Academy, and the girlfriend of good friends on the same person.So there's a life jacket. You should wear it. There's bullet proof clothing. You should wear it.This is called to be the man, who will make it happen.
