... boring micrometer 镗孔千分尺 bottom fastening bolt 底螺栓 bottoming tap 平底螺丝攻 ...
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bottom m fastening bolt 底螺栓
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A bestriding support and a fastening bolt are arranged on the bottom of a supporting rod of the generating power supply, and can be quickly mounted on a balcony parapet.
在发电电源支杆撑底部设有跨骑架 和紧固栓，用于快捷安装于阳台围栏上。
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