短語(yǔ)詞組短語(yǔ)piston maximum travel 活塞最大行程piston rod travel 活塞桿的行程piston ring travel 活塞環(huán)行程brake cylinder piston travel 制動(dòng)缸活塞行程brake piston travel 制動(dòng)器活塞行程nominal piston travel 活塞標(biāo)稱位移piston travel changed 變行程short travel piston 短行程活塞long travel piston 長(zhǎng)行程活塞 返回 piston travel