Always depressurize a regulator before closing the adjusting knob and removing the regulator from the cylinder.
在关闭和从钢瓶断开,总是使减压。
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Used as a fastener or as a force modifier, the screw is kind of like a wedge wrapped around a cylinder.
螺丝通常被用作紧固件或力,它有点像缠在圆柱体上。
That minus 1 is our adjuster so that we don't underestimate.
负 1 是我们,因此我们不会低估。
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