这三座转炉都是纯氧 顶吹 的.These three converters are all pure oxygen top - blow .L. D. 炼钢法使用炉内砌有耐火砖的氧气 顶吹 转炉.The L. D. Process uses a top - blow oxygen converter lined with heat - resistant brick.这对中小型转炉钢厂比较适宜.This is right medium ...
What is the rate for printed matter?邮寄印刷品的邮资是多少?Can I send these as printed matter?我可以将这些作为印刷品寄 吗 ?Baking heat dehumidifying of printed matter, on the batch before postrenal.烘热除湿的印品加工件, 先上后下分批使用....