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1982年10月26日至28日,由煤炭部西安煤矿设计研究院、江苏省灌云县经委和灌云精密铸造厂联合筹办,在灌云县召开了高压管接头产品评鉴会议。
From October 26th to 28th, 1982, the Xi’an Coal Mine Design and Research Institute of the Ministry of Coal, the Economic Commission of Guanyun County of Jiangsu Province, and the Guanyun Precision Foundry jointly organized and held a review conference for high-pressure pipe joint products in Guanyun County.