化石燃料的开采历史表明，这些步骤或将带来危害。
The history of fossil-fuel extraction suggests that these processes may do harm.
Halliburton Co .负责了钻井平台的固井工作，当勘探性开采完成而生产还没有开始的时候，固井是稳定油井的一个关键步骤。
Halliburton Co. handled the rig's cementing work, a key component in stabilizing a well when exploration drilling is finished but production hasn't started.
阐述编制露天矿的各种开采计划的方法和步骤，以及其台阶划分、计划台阶顶底板的控制、编制剥离量和采矿量及其煤质指标等；
It expounds various mining methods and steps, including the bench demarcated, plan mining bench top and bottom floor, the coal and overburden amount of plan mining, and coal quality indicators.
作者介绍了煤炭资源开采价值的概念、评估指标及其量化方法、评估模型与步骤以及评估实例。
The concept of mining value of coal resource, assessment indexes and quantification method for them, assessment model and steps, a...
分别阐述了“补给法”地下水水质水量结合评价方法和“开采法”地下水水质水量结合评价方法的思路和操作步骤。
The thoughts and steps for the two methods for the combining assessment groundwater quality and quantity-make-up method and production method are elaborated respectively.
分别阐述了“补给法”地下水水质水量结合评价方法和“开采法”地下水水质水量结合评价方法的思路和操作步骤。
The thoughts and steps for the two methods for the combining assessment groundwater quality and quantity-make-up method and production method are elaborated respectively.
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