影响覆冰的自然因素很多，例如地形、风速、电线直径和海拔高度等。
There are many natural factors that affect icing, such as terrain, wind velocity, cable conductor and altitude, etc.
我们必须先测量电线的直径。
不同材料的电线，尽管直径、长度相同，其电导率是不一样的。
Wires of different materials, although of the same diameter and length, differ in their conductivity.
如果电线的直径更小，它的阻力会增大。
Were the diameter of a wire smaller, its resistance would be increased.
支持所有流行的线缆直径为600和1000伏直流系统，PV-03连接器符合安全安装电线的NEC2008标准。
Supporting all popular cable diameters for both 600 and 1000 Volt DC systems, PV-03 Connectors meet the NEC2008 standard for safe installation of electrical wiring.
支持所有流行的线缆直径为600和1000伏直流系统，PV-03连接器符合安全安装电线的NEC2008标准。
Supporting all popular cable diameters for both 600 and 1000 Volt DC systems, PV-03 Connectors meet the NEC2008 standard for safe installation of electrical wiring.
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