Bear with me while i cover the preliminary ground and while i clear out some underbrush 请大家先耐心地听我介绍一些基本情况并剔除一些杂论。
Hydraulic fracturing is firstly applied to increase the output of oil well as a technique , and then is applied to test the preliminary ground stress 水力劈裂首先作为一种技术最初应用于石油工业以增加油井产量,后来用于初始地应力测量。