Cold upset female die of fillister head is the key mold in the manufacturing process of heading bolt.

冷镦圆头凹模是冷镦螺栓生产过程中的关键模具。

Abstract: Cold upset female die of fillister head is the key mold in the manufacturing process of heading bolt.

摘 要: 冷镦圆头凹模是冷镦螺栓生产过程中的关键模具。