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根据原国家建委1980年和1982年下达的“建筑机械标准制订、修订计划”的规定,由中国建筑科学研究院结构所负责、四平建筑机械厂、柳州建筑机械厂和大连拉伸机厂三单位参加共同进行《预应力筋液压拉伸机——千斤顶》、《预应力筋液压拉伸机——电动油泵》和《预应力筋液压镦头器》三项部标准的编制工作。标准编写组经两年多的调查研究、收集资料、征求意见和反复修改,
In accordance with the provisions of the “Construction Machinery Standard Formulation and Revision Plan” issued by the former State Construction Commission in 1980 and 1982, the Institute of Structural Science, China Construction Science Research Institute, Siping Construction Machinery Factory, Liuzhou Construction Machinery Factory, and Dalian Stretching Machine Factory Participated in the preparation of the three ministry standards: “Prestressed tendon hydraulic stretching machine - Jack”, “Prestressed tendon hydraulic stretching machine - electric oil pump” and “Prestressed tendon hydraulic hammer device”. After more than two years of investigation and research, data collection, comments, and repeated revisions, the standard writing team