埋头螺栓;
Carriage bolt ( coach bolt): Has a domed or countersunk head, and the shank is topped by a short square section under the head.
马车螺栓(螺栓教练):有一个圆顶或沉头,而小腿是由简短根据头方节突破。
Heading-Extrusion Technology of Flat Countersunk Square Neck Bolt
沉头方颈螺栓镦挤工艺
纳米英语 · 双语娱乐资讯