hex bolts的用法和样例：
例句
- It shows that with the control over the friction factor, near-net-shape forming of hexagonal bolts can be achieved.
另外成形方案四模拟结果显示，有进行模仁表面粗糙度之控制，可达成六角螺栓近净形成形的目标。 - Adopting cold-drawing hight coils or bars of stocks and heating automatically it fits for light producing six angle bolts,rivets and other articles with heads.
采用冷镦拨光盘或棒料，自动进行镦锻，适用于制造光六角螺栓，锍钉及其它带头部的零件。
