常見(jiàn)例句雙語(yǔ)例句The working process for cold extruding of valve-spring base has been described, with a new die structure using ejector turning of itself.介紹了氣門(mén)彈簧座的冷擠壓工藝和新型模具結(jié)構(gòu)。 返回 ejector valve