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(一)前言 D60钢的切头、切尾率按转产时规定切头为12.5％,切尾为3.0％。这个规定,在当时确保D60钢产品质量方面起了重要的作用。
(A) Foreword D60 steel cut, cut tail rate according to the provisions of the conversion of cut 12.5%, cut tail to 3.0%. This provision played an important role in ensuring the quality of D60 steel products at the time.