butt-welded seam是什么意思，butt-welded seam的翻译，butt-welded seam音标、读音、用法和例句

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butt-welded seam是什么意思，butt-welded seam的翻译，butt-welded seam音标、读音、用法和例句_乐豆毛深蓝词典