1)gang way cable,主巷道电缆2)main transport roadway,主运巷道3)main development tunnels,主要开拓巷道4)main haulage drift,主要运输巷道5)main workings plan,主要巷道平面图6)main cable,主杆电缆
用法例句
: This paper discusses the concept of main development tunnels and the classifications of development methods and describes the application of all kinds of development methods in gold mines.
