... for the field of coal, metallurgic,mine,forest, railway,road turnnel construction and etc.The company take the good advantages in the field of mine control system ... with different voltage, different spread of track, different weight of trolley locomotive, the weight have 7t, 8t, 10t, ... (mm)1100Wheel diameter (mm)680Height btw connector & track surface (mm)320/430Min curve radius (m)7Battery volatege ...