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一季度在武汉召开第五次螺旋压力机专题讨论9月初在北京召开第一次中日冲压学术会议;10月中旬在武汉召开第五届全国锻压学木年会会4月份在北京召开精锻专题讨论会;
In the first quarter, the fifth press conference on screw press was held in Wuhan. The first press conference was held in Beijing in early September. In the middle of October, the fifth national press conference held in Wuhan was held in Beijing in April. Symposium;