butt-welded with square ends

例句：

1. 1.The car was butt-weldedtogether to make it stronger.
   这辆车是用直角焊接在一起，使其更坚固。
2. 2. Themetal parts were butt-weldedtogether for strength.
   金属部件是用直角焊接在一起以增强强度。
3. 3. The construction workers usedbutt-welded joints tojoin the beams.
   建筑工人使用直角焊接接头来连接梁。