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several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurattle of this article ——Fracture network engineering for hydraulic fracturing。
At first glace,we can know that it talk About two concepts , fracture network engineering and hydraulic fracturing.
In order to help you understand the article .I'll give you some concepts. thay are very necessary.
第一个就是：裂隙网络工程，大家只需要理解，这是一个庞大的数值模拟系统，通过这个系统我们可以了解地下岩体的各种特性。请注意数值模拟这个概念，简单的讲就是通过在计算机建立模
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measuremen