This device is practical in the realisation of unattended power substation and earthing system with littlecurrent.
该装置对于小电流接地系统及实现变电站无人值班具有广泛的应用价值。
2
They require littlecurrent, need no backlighting and can be produced for little more than half of the cost of a liquid crystal display screen.
它们需要的电流很小,不需要背光,并能以液晶显示屏一半多一点的成本生产。
3
The use and development of livestock breeds and the conservation of valuable breeds that are of littlecurrent interest to livestock producers need to be upgraded.