When it is in the vertical welding position, the slag and melted iron can not be dripped and the through welding of weld sublayer can be ensured.是什么意思_When it is in the vertical welding position, the slag and melted iron can not be dripped and the through welding of weld sublayer can be ensured.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句