基本解释定位球塞英汉例句雙語例句Ball plungers;球頭柱塞;Moreover, the ball plungers (6) are positioned near the piston top dead center, at which the piston ring is positioned.另外,球塞(6)設置在靠近活塞上死點的活塞環所在的部位。ip.comball plunger更多例句