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加拿大统计局对本国一些采矿公司和75个金刚石钻探承包公司进行能源、矿山和资源的调查中,统计出历年总的钻探工作量(包括爆破孔)如下:
Statistics Canada conducted a survey of energy, mines and resources for some of its mining companies and 75 diamond drilling contractors over the past year as follows: Total drilling workload (including blast holes) is as follows: