短語詞組短語hoel of piston crown 活塞出油孔Welder piston crown 活塞銲接機(jī)piston crown break 活塞頂裂損detachable piston crown 可拆活塞頂piston crown ablation 活塞頭燒蝕;活塞頂燒蝕underside of piston crown 活塞頂內(nèi)側(cè)piston crown deposit 活塞頂沉澱ceramic piston crown 陶瓷活塞頂hole of piston crown 活塞出油孔 返回 piston crown