sun gear retainer bolt 中心齿轮固定螺栓

pin retainer bolt 销护圈螺栓

axle retainer bolt 车轴固定螺栓

plate retainer bolt 护板螺栓

fuel inlet retainer bolt 进油口固定螺栓

crank pin retainer bolt [铁路] 他曲拐销挡圈螺栓

dump body pin retainer bolt 翻斗车销固定螺栓

pivot shaft retainer bolt 枢轴护圈螺栓

loose retainer bolt 松动的定位器螺栓