But the research on borehole deviation control is very few.但在井斜控制方面的研究还很欠缺.Borehole hydromining is a kind of safe and efficient new mining method.钻孔水力采煤是一种既安全、又能极大地提高资源利用率的新的采矿方法.There is some trouble in the borehole. Do...
There is some trouble in the borehole. Don't leave the rig floor.井下出现复杂情况, 不要离开钻台.Borehole hydromining is a kind of safe and efficient new mining method.钻孔水力采煤是一种既安全、又能极大地提高资源利用率的新的采矿方法.But the research on borehole ...
.He is one of the best tenor sax players ever.他是有史以来最出色的次中音萨克斯管演奏者之一。They had a bass and a piano and a sax and percussion.他们有一把低音吉他、一架钢琴、一管萨克斯和打击乐器。So he sax on the ground, unwilling to get up yet embarrassed to remain t...