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从世界各国清查的情况看,可概括为三个类型: 第一类调查法: 区域性或全国性的资源调查,供上层管理与制定计划之用。对资源潜力作预估,为估
From the world inventory of the situation, can be summarized into three types: The first survey method: a regional or national resource survey for the top management and planning. Estimate the potential of resources for the assessment