...螺母）flanged nut （凸椽螺母）/lock nut（锁紧螺母）等； bolt(螺栓)可分为big-end bolt （大 端螺栓）/coach bolt（方头螺栓）/connecting-rod bolt（连杆螺栓）/double-ended bolt（双头螺栓）/eye bolt （环头螺栓）/rag-bolt（棘螺栓）等；screw(螺钉)又...
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coach h bolt 方头螺栓
N a large round-headed bolt used esp to secure wood to masonry (用于把木头固定在石头上的)方头螺栓 (Also called (chiefly US and Canadian) carriage bolt)
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