开启阀门时，躲开调整器和阀门排气口。
Stand clear of the regulator and valve outlet, while opening the valve.
进气口开大排气口关小使输出压力增加，因此执行机构推杆向下移动使调节阀阀芯开启或关闭。
Large intake vents open so that the output pressure off small increase, thus putting downward movement so that implementing agencies spool valve to open or close.
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