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.
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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