He carries a smokehood but warns that if you're going to follow his example you must learn how to use it.
他在旅行中会携带一个防烟头罩，但他警告说，想像他这样，就要学会如何使用该头罩。
2
Have you ever experienced you were uncomfortable when you had to check air flow with a smoke tube where ventilation fan or hood was unreachable or was located at confined space?
你经历过你不舒服，你必须检查它配备了烟管流动凡通风风扇罩无法访问或曾在密闭空间在哪里？
3
Analyses problems in the oil smoke extraction hood structures and propose a solution plan.