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掘进汽车斜坡道开拓矿床下部矿体可缩短采准时间。不用掘进一个或几个竖井,只要优化汽车斜坡道的位置来缩短水平基建巷道的长度,既可减
Driving a car ramp to open up the lower ore body can shorten the mining time. Without digging one or a few shafts, as long as the location of the car ramp is optimized to reduce the length of the horizontal infill lane, either