This paper suggests that mining enterprises have to utilize the economic grade which relies on the balanceof revenue and expenditure from the view point of maximum utilization of mineral resources.
本文从充分利用矿产资源的角度出发,认为矿山企业运用收支平衡经济品位势在必行。
2
The giant salamander is a second-grade animal under state protection. Research on the animal is of great biological significance to protecting rare animals and keeping an ecological balance.
大鲵是国家二级保护动物,对大鲵进行研究在保护珍稀动物和保持生态平衡方面具有重要的生物学意义。
3
That is, one more capacity grade can be increased on the base of impedance-matched balance traction transformer SF2-QY.