You sit on a scale inside a tank of water and blow out as much air as you can.
你坐在里面的规模上的水箱和吹熄你可以尽可能多的空气。
The air tank includes the body, safety valve, blow-off valve, pressure meter and manhole, etc.
储气罐包括本体，安全阀，排污阀，压力表，人孔等。
The air tank includes the body, safety valve, blow-off valve, pressure meter and manhole, etc.
储气罐包括本体，安全阀，排污阀，压力表，人孔等。
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