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一种用于地下矿山的可移式破碎机生产阶段样机,已由美国矿务局研制出来。并在地面矿场成功地进行了试验。地下试验计划在1982年进行。
A prototype of the portable crusher production stage for underground mines has been developed by the U.S. Bureau of Mines. And successfully conducted the test in the ground mine. Underground test program was conducted in 1982.