The nut and bolt head can be simply drawn as Outlines.

螺母及螺栓头部简化画出。

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The design of the bolt head insures that the bolt will not slip or rotate when the rubber is turned.

这种设计确保了在旋转橡胶的时候螺栓不会滑动或旋转。

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At Detail 02; there cannot be an exposed bolt head below the line of the finished transom enclosure.

在节点大样图02上，在横框盖板完成面的线的下面不可能会有一个暴露在外的螺帽。

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The Sami are preparing corrals into which they will herd the reindeer, then slaughter them with a captive bolt gun shot to the head.

BBC: South Georgia prepares to cull its invasive reindeer

One of three women who were killed in Bradford died from severe head injuries caused by the bolt from a crossbow, an inquest has heard.

BBC: Bradford woman 'killed by crossbow bolt and knife'