butt-seam-welding是什么意思 butt-seam-welding在线中文翻译

butt-seam-welding是什么意思，butt-seam-welding在线翻译，butt-seam-welding中文意思，butt-seam-welding的中文翻译，butt-seam-welding发音，butt-seam-welding例句，butt-seam-welding词组短语，butt-seam-welding怎么翻译，单词butt-seam-welding的意思