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“鐓鍛”的英語可以翻譯為：[冶] upsetting ...

“鐓鍛”的拼音為：dūn duàn...

介紹了石油鉆桿端部鐓鍛加厚工藝基本原理及加厚方式.The basic principle and the method of oil drill pipe end upsetting process were presented.本文介紹了先進的TR鐓鍛法制造曲軸毛坯的工作原理.The paper introduces the working principle in making crankshafts by using advanc...