Finally hydromining method, an inareawere found through comparison between various mining methods.通过多种采煤方法的试验 、 比较后,找到了一种对复杂煤层适应性较强的采煤方法——水力采煤方法.Borehole hydromining is a kind of safe and efficient new mining method.钻孔水力...
偏头痛的其他诱因还有电脑的视频显示器和灯管照明。Other causes of migraine are VDU screens and strip-lighting.从网上冲浪者的显示器上可以看到很多可“光顾”的商店。Seen from a netsurfer's screen, there are plenty of stores to "visit".21英寸屏幕的显示器a monitor with a 21 inch ...