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根据冶金工业部安排,为适应大型露天矿山运输设备的需要,做好消化国外引进技术,立足国内研制170吨电动轮汽车,常州冶金机械厂一九八一年与美国UR公司签订了技术合作补偿贸易合同。其中,包括电动轮汽车的关键铸钢件,以SAE8620、8630、4330为主,计有七个钢种16项产品。合同要求按美方质量保证部门提出的标准,对产品进行严格的检查验
According to the arrangement of the Ministry of Metallurgical Industry, in order to meet the needs of large-scale open pit mine transportation equipment, to digest the imported technology abroad, based on the domestic research and development of 170t electric wheel motor vehicles, Changzhou Metallurgical Machinery Factory signed a contract of technical cooperation with U.S. UR Company in 1981 Trade contract. Among them, the key steel castings for electric wheel vehicles are SAE8620, 8630 and 4330, accounting for 16 steel products in seven grades. Contract required by the United States quality assurance department standards, strict inspection of the product inspection