SIGNAL PROCESSING APPARATUS ANF METHOD 信号処理装置及びその方法 - 特許庁
To provide a method of manufacturing an electric resistance welded tube excellent in weld zone characteristics, by which the weld zone characteristics (low temperature toughness particularly) can surely anf sufficiently be enhanced. 溶接部特性(特に低温靭性)を確実かつ充分に向上させうる、溶接部特性の良好な電縫管製造方法を提供する。 - 特許庁