This craft is valuable resource of developing national culture and also a good source material of national culture research.
这一工艺是民族文化开发的珍贵资源，也是民族文化研究的好素材。
In view of the mine actual situation of coal resource approaching exhausted, natural coke excavation craft was studied.
针对矿井剩余煤炭储量接近枯竭的实际情况，进行了天然焦开采工艺研究。
The treated water is colorless and transparent, can be used in the industry circulating water directly, which economizes the water resource, this method has low costs, and the craft is simple.
处理后的水无色透明，可直接用于工业循环水，节约水资源。该法成本低，工艺简单。
The treated water is colorless and transparent, can be used in the industry circulating water directly, which economizes the water resource, this method has low costs, and the craft is simple.
处理后的水无色透明，可直接用于工业循环水，节约水资源。该法成本低，工艺简单。
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