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辽宁省有色金属矿山平巷机械化掘进技术表演赛,于1980年9月2~7日在青城子铅矿南山坑举行。参加这次表演赛的共有七个机械化掘进队,这七个队都是在上半年中达到平均月进尺150米,面效0.5米以上的队。表演赛上场的大多是青年操作手,他们技术比较熟练,操作速度较快,凿岩一般在60分钟左右,装岩大多在50分钟左右,掘进率平均达到91%。在上半年中,月进尺和面效
Liaoning Province non-ferrous metal mine roadway mechanized tunneling technology exhibition match, in September 1980 2 ~ 7 in Qingchengzi lead mine Nanshan pit held. A total of seven mechanized driving teams participated in the show. All seven teams reached the average of 150 meters per month in the first half of the year with a surface area of more than 0.5 meters. Most of the performance games are played by young operators. They are relatively skillful and operate at a speed of about 60 minutes. Most of the rocks are loaded with rock for about 50 minutes and the average penetration rate is 91%. In the first half, the monthly footage and surface efficiency