piston ring gap 活塞环开口间隙 ; 活塞环间隙 ; 活塞环自由间隙
piston ring gap clearance-compression 气环开口间隙
piston ring gap clearance-oil control 油环开口间隙
ring gap specification 环间隙技术规格
piston ring gap clearance 活塞环接口间隙 ; 活塞环搭口间隙
oil ring gap 油环间隙
ring-gap restrictor 环隙节流堵
ring gap detail 活塞环切口
ring gap in bore 汽缸内活塞环切口间隙
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