英语翻译

题目

英语翻译
METHODS
Mine characteristics
The coal mine in the Mbeya Region of Tanzania has 600 workers,of whom 240 are involved in
underground tasks.It has operated at a capacity of 150 000 tonnes of bituminous coal per year since 1988.The coal seam is accessed through an almost horizontal entrance,where networks of underground roads are constructed for extracting and transporting coal to the surface for processing.Wooden props (timber) with caps (crossbars) are set to support the exposed roof and are allowed to remain in place as the face is advanced.Props with caps are also used to protect the conveyor,the working face and the intake and return airways.A reversible fan placed outside at a higher elevation ventilates the mine.The development site is a dead end,ventilated through an air duct,which has no air return,presumably making ventilation poor compared with other mining sites.
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答案

坦桑尼亚姆贝亚地区煤矿有600名工人,其中240人在地下工作.自1988年以来,它每年生煤吞产量达15万吨.煤层由一个几乎水平的入口进入,这里正在建设地下道路,以运送煤到地面处理.带有横木的木制道具装在上面,以支撑暴露的...