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They often understated their coal output. 他们常常少报他们的煤炭产量。
We have raised the coal output by using better mining methods. 我们利用更好的采煤法增加了煤炭产量。
In the first half of this year the total coal output rose by eighty per cent as compared with that of last year. 今年前半年煤炭总产量比去年增加了百分之八十。
Our raw coal output last year was more than 630 million tons,which seems not bad by comparison. 我们去年的原煤也达到六亿三千多万吨，似乎不算少。
Our raw coal output last year was more than 630 million tons, which seems not bad by comparison. 我们去年的原煤也达到六亿三千多万吨，似乎不算少。
In this paper, calculation methods for the pulverized coal output widely applied in ball pulverizer of bin storage firing pulverizing system in boiler are studied. 对广泛应用于电站锅炉中间储仓式制粉系统中的钢球磨煤机的磨煤出力计算方法进行了研究,讨论了一种新的优化计算方法,并对其流动阻力计算进行了分析。
Through the study of ground deformation,variable mining ratio method was put foreward to raise coal output ratio,effective measures to realize the method were introduced. 通过对地表移动变形规律的认识,提出了采用变采留比方法以提高条带法开采采出率,并对该方法影响效果进行了分析,提出了实施此方法的有效措施。
Take coal output for example.In 1978 the total amount of marketable coal mined in the United States was in excess of 599 million tons,and the output of raw coal in the Soviet Union was 724 million tons. 例如煤产量，一九七八年，美国商品煤五亿九千九百多万吨，苏联原煤七亿二千四百万吨。
Take coal output for example.In 1978 the total amount of marketable coal mined in the United States was in excess of 599 million tons, and the output of raw coal in the Soviet Union was 724 million tons. 例如煤产量，一九七八年，美国商品煤五亿九千九百多万吨，苏联原煤七亿二千四百万吨。
Mathematical model of composite cost for coal output -footage 煤炭企业产量-进尺综合成本的数学模型
We need to replenish our stocks of coal. 我们需要再次补充煤的储备。
She piled on more coal before the fire go out. 在火熄灭之前她又加上些煤。
I add the coal on the flame continuously. 我不断朝火里添加煤炭。
They are ventilating the sap of a coal mine. 他们正在使煤矿坑道通风。
Prohibition was laid on the export of coal. 禁止煤炭输出。
The yearly output of coal was quartered in a year. 煤炭年产量一年中减少到原来的四分之一。
He put a shovel of coal on to the fire. 他往火炉里加了一铲煤。
That coal mine is no longer worked. 那个煤矿已经不经营了。
We have enough coal to see the winter out. 我们有足够的煤过冬。
They eked out their coal by collecting firewood. 他们拣拾木柴以补充煤的不足。