wide area difference
wide area difference
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Wide Area Difference GPS Technology and Its Development and Application in Projects
广域差分GPS技术在工程中的发展和应用
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The colliery , as one kind of the mine , is a kind of special geographical area , which is in large scale , wide area , big difference between geological condition and coal seam composition .
煤矿作为矿山的一种,是一种特殊的地理区域,规模庞大,面积较广,地质条件和煤层赋存条件差别很大。
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