字典網>> 英漢字典>> W開頭詞條>>weld root opening的意思 漢英字典weld root opening中文翻譯：【化】 焊縫根部間隙 字典網相關詞條：welding deformation weld crosswise welding (base) metal weld metal welding operator welding rod coating weld polarity welding table welding transformer welded vessel