piston bore diameter 活塞孔直径
piston to bore clearance 活塞与缸套间隙
piston pin bore diameter 活塞销孔直径
piston pin bearing bore diameter 活塞销轴承孔直径
piston pin bore 活塞销孔
small-bore piston 小缸径活塞
piston ring gap in bore 活塞环在气缸内的开口间隙
piston pin with taper bore 两端带锥孔的活塞销
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