counter sunk screw pin shackle 平头螺栓卸扣

sunk screw west bank 埋头螺丝

cross sunk screw 十字沉头螺钉

SUNK SCREW WASHER 沉头螺钉垫圈

sunk wood screw [机] 埋头木螺丝

counter sunk bone screw 释义沉头骨螺钉 ; 沉头骨螺钉

half counter sunk bone screw 半沉头骨螺钉

counter-sunk wood screw 沉头木螺丝

flat counter-sunk head screw 平顶埋头螺钉