短语词组短語valve -opening pressure 氣門開啓壓力;活門打開壓力Intake valve -opening time 進氣持續角Exhaust valve -opening time 排氣持續角relief -valve opening 釋放閥啓開injection -valve opening pressure 噴油閥開啓壓力full -opening valve 全逕閥門;敞開閥;全逕閥 返回 valve opening