All kinds of main relationship between natural technology conditions and coal cost are analysed, and the influence degree of cost variations resulted from the influence factors is determined.
分析了各种主要的自然技术条件与原煤成本变化的关系，由此确立了各影响因素对成本变化的影响程度。
All kinds of main relationship between natural technology conditions and coal cost are analysed, and the influence degree of cost variations resulted from the influence factors is determined.
分析了各种主要的自然技术条件与原煤成本变化的关系，由此确立了各影响因素对成本变化的影响程度。
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