cutter wheel retaining pin 切割机轮固定销

firing pin retaining pin 击针止动销 ; 击针固定销钉

pile retaining pin 毛圈护针

cotter pin retaining pin 开口销固定销

blade retaining pin 叶片固定销

model retaining pin 模型留置针

spring retaining pin 弹簧挡销

hammer retaining pin 锤片保持轴销

ejector retaining pin 抛壳挺固定销