词汇	默认推理
释义	默认推理医default reasoning
随便看	piston ring plier piston ring pliers piston ring putting in and out tool piston ring remover piston rings piston ring scuffing piston ring seal piston-ring seat piston ring side piston ring side clearance piston ring slot piston ring spreader piston ring sticking piston ring superfinishing machine piston ring tension piston ring tension scale piston ring tongs piston ring tool piston ring top land piston ring travel piston ring type seal piston ring, untrue piston ring wall piston ring wall 活塞环径向厚度 piston ring wall活塞环径向厚度