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全苏矿井建设施工组织及机械化科学研究所在1961年-1962年内,进行了炭素工具钢y7及弹簧钢55C2制造的钎子的比较试验,试验是在顿涅茨矿井建筑管理局的许多矿井中进行的,为了采用合理的机械加工与热处理工艺,在“新中央”矿井组织了井口钎子修理工场,按全苏矿井建设施工组织及机械化科学研究所制的工艺制造钎子。
In the period 1961-1962, the coal mine construction construction organization and the Institute of Mechanized Science conducted a comparative test of brazing rods made of carbon tool steel y7 and spring steel 55C2 at many of the Pitts Don Mine Construction Authority mines In order to adopt reasonable machining and heat treatment processes, a wellhead repair shop was set up at the “New Central” mine and the brazing rods were manufactured according to the process of construction and mechanization of the All-China Mine Construction Institute.