button-head cap screw

button-head... ... button head bolt 圆头螺栓 button-head cap screw 圆头帽螺钉，半圆头紧固螺钉 button-head screw 圆头螺钉 ...

造纸专业英语词汇表 - 豆丁网 ... rotary inlet 旋纸接纸 button-head cap screw 纸纸螺纸 rotation 旋纸 ...