Making full use of and recovering BF-gas are important means for saving energy, reducing consumption and product cost, increasing economical profits.
充分回收利用高炉煤气，是节能降耗，降低生产成本，提高经济效益的重要途径。
Economical operation of hydroelectric plants plays an important role in relieving the tension of domestic power supply and increasing economic profits of hydroelectric plants.
水电厂经济运行的实现对于缓解我国目前电力供应紧张局面以及提高水电厂经济效益很有意义。
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