The technical progress contribution ratio for growing velocity of China's total output of construction industry is 39.01% in the year of 2004 based on the method of growing velocity equation.
按增长速度方程法算出的2004年技术进步对中国建筑业总产值增长速度的贡献率为39.01%。
The security of the stoping-cemented fill method is good and the rate of extraction is high. It has made the contribution for mine in technical progress and improving economic benefits.
胶结充填采矿法安全性好、回采率高，为矿山技术进步、提高经济效益起到了积极作用。
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