基本解释[机] 方头螺栓，马车螺栓词组短语短语coach h bolt 方头螺栓coach bolt更多词组英英字典柯林斯英英字典 a large round-headed bolt used esp to secure wood to masonry (Also called (chiefly US and Canadian) carriage bolt)coach bolt剑桥字典coach bolt柯林斯字典专业释义机械工程方头螺栓