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PROCESS FOR OPERATING MINES OR GROUNDWATER BY DOWNWARDS AND FOUDROYAGE AND INSTALLATION FOR ITS IMPLEMENTATION
PROCESS FOR OPERATING MINES OR GROUNDWATER BY DOWNWARDS AND FOUDROYAGE AND INSTALLATION FOR ITS IMPLEMENTATION
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机译:下山和下山开采矿山或地下水的过程及其实现的安装
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PROCESS OF EXPLOITATION OF UNDERGROUND MINES OR QUARRIES BY DESCENDING CLEARANCES UNDER A CEILING, CHARACTERIZED IN THAT THE CEILING IS DIVIDED INTO A PLURALITY OF CEILING ZONES SUPPORTED D1 ... INDEPENDENTLY OF THE OTHERS AND, FUR AND TO MEASURE WHAT WE EXTRACT FROM ORE UNDER THIS CEILING, WE BLAST FROM NEAR TO NEAR THE SAID ZONES ON A LIMITED HEIGHT. /P P APPLICATION ESPECIALLY TO THE EXTRACTION OF COAL, METAL ORE ...
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