基本解释[機] 方頭螺栓，馬車螺栓词组短语短語coach h bolt 方頭螺栓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機械工程方頭螺栓