ring expander tool 环扩张器工具

ring expander guide 环扩张器导管

piston ring expander 活塞环端隙

expander ring 扩张器环

spring expander oil ring 弹簧胀圈油环

expander type ring 撑胀器活塞环

spiral expander ring 带螺旋型衬环的活塞环

expander type piston ring 涨圈式活塞环

ring with coil-spring expander 螺旋弹簧胀圈活塞环