为了使阀门材料立足于国内,在阀门选材方面走我国自己的道路,根据上级指示,我厂与苏州第二阀门厂、一机部通用机械研究所、上海机械制造工艺研究所等单位,于六八年八月联合组成了以工人为主体的稀土镁球墨铸铁阀门试验小组,对稀土镁球墨铸铁代替铸钢制造中压阀门进 In order to make the valve material based on the domestic, in the selection of valves to take our own own way, according to instructions from the higher level, I plant and the second valve plant in Suzhou, a machine General Machinery Research Institute, Shanghai Machinery Manufacturing Technology Institute and other units, Eight years in August jointly formed a workers as the main rare earth magnesium nodular cast iron valve test group, the rare earth magnesium nodular cast iron instead of steel to create medium-pressure valve into