气门座刀具 Valve seat cutter
气门座偏心磨光机 Eccentric valve seat grinder
气门座磨光机 Valve seat grinder
进气门座 INTAKE VALVE SEAT ; inlet valve seat
气门座圈 valve seat ring ; Ventilsitzring ; INSERT,VALVE ; valve retainer
气门座修磨机 valve seat grinding machine
排气门座 exhaust valve seat ; SEAT-EXHAUST VALVE
气门座修整器 Valve reseater
气门座绞刀 valve seat reamer
向下的运动使气门向下移动离开气门座，气门被打开。
This downward movement forces the valve to move downward off its seat so that it opens.
当这发生时，气门弹簧紧紧地封闭气门口，叫做气门座。
As this occurs, valve springs pull the valve tightly closed against its opening, called the valve seat.
当这发生时，气门弹簧紧紧地关闭气门口，叫做气门座。
As this occurs, valve springs pull the valve tightly closed against its opening, called the valve seat.
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