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1983年12月机械工业部赴西德压力容器检验监督技术考察组在联邦德国斯图加特大学国家材料研究所(MPA)参观时见到,该所采
December 1983 Ministry of Machinery Industry to West Germany pressure vessel inspection and supervision of technical inspection team at the Federal University of Stuttgart, the National Materials Institute (MPA) to visit, the mining