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由四川省煤管局主持的“7BG-4.5/160型水泵和7BZ-3/100型水泵技术鉴定会”于6月17～19日在四川煤矿机械厂举行。该两种泵由煤炭科学研究院重庆研究所研究设计,四川煤矿机械厂试制。与会代表对两种水泵
The “7BG-4.5 / 160 Water Pump and 7BZ-3/100 Water Pump Technical Appraisal Meeting” hosted by Sichuan Coal Administration was held in Sichuan Coal Mining Machinery Factory from June 17 to June 19. The two pumps by the Chongqing Institute of Coal Research Institute of Design, Sichuan Coal Mine Machinery Factory trial. Participants on both pumps