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由中国金属学会粉末冶金学会、中国有色金属学会粉末冶金及金属陶瓷学术委员会、中国机械工程学会粉末冶金专业学会等七个学术团体联合举办的第四次全国硬质合金学术会议于1989年10月20日至25日在
The fourth national cemented carbide conference jointly held by seven academic groups such as Chinese Society of Powder Metallurgy Society, China Nonferrous Metals Society of Powder Metallurgy and Cermet Academic Committee, China Mechanical Engineering Society of Powder Metallurgy Association in October 1989 From 20th to 25th