根据国家建委(74)建科字第28号文下达的「钻孔灌注桩施工机械研制,选定型与设计施工技术措施编制」专题科研任务,在天津市建委统一领导下,交通部第一航务工程局与河北省新河县农机二厂共同组成了工程潜水电动钻机研制试验小组。在批林批孔运动和学习无产阶级专政理论的推动下,坚持设计、制造、使用工人、干部、科技人员两个三结合,从1974年11月开始着手方案讨论,12 According to the project entitled “Development, Selection, Design and Construction of Bored Pile Construction Machinery” issued by State Construction Committee (74) Jianke Zi No. 28, under the unified leadership of Tianjin Construction Committee, the Ministry of Communications Navigation Engineering Bureau and Agricultural Machinery Plant in Xinhe County, Hebei Province jointly formed a research and development of submersible electric drilling rig test group. Driven by the theory of “criticizing the proletariat and criticizing the proletariat and learning the theory of dictatorship of the proletariat,” they insisted on the combination of designing, manufacturing and using workers, cadres and scientific personnel. From November 1974, it began to discuss the plan and 12