It is required by production character of ERW pipe that Process qualification must be carried out before batch production of ERW pipe,which is named as the first day production.是什么意思_It is required by production character of ERW pipe that Process qualification must be carried out before batch production of ERW pipe,which is named as the first day production.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句