全部

1·That main excavation and loading equipment at present in domestic large-scale open-pit is the Electric shovel.

目前国内大型露天矿山的铲装设备主要是电铲。

2·Forecast of first-class time parameters such as truck s travel time and shovel s loading time is an important problem for truck dispatching system in open-pit mines.

道路运行时间、电铲装车时间等一类时间参数的预测是露天矿卡车调度系统中的一个重要问题。