wearing ring clearance 止漏环间隙

piston ring gap clearance-compression 气环开口间隙

piston ring gap clearance-oil control 油环开口间隙

piston ring side clearance 活塞环端面间隙 ; 活塞环端隙

piston ring axial clearance 活塞环轴向间隙 ; 活塞环纵向间隙 ; 天地间隙 ; 活塞环平面间隙

piston ring end clearance 活塞环对口间隙

piston ring joint clearance 活塞环接口间隙 ; 活塞环搭口间隙