highway development
公路开拓
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公路运输开拓 highway transportation development system
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并对如何减少开拓固定公路和临时公路压矿、减少平果铝土矿的采矿损失率、充分利用国家矿产资源等问题，进行了论述。
He also describes how to reduce the ore quantity under the road in the development of permanent road and temporary road, how to decrease the mining loss of Pingguo Bauxite...
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