We decide the cross and span clearance by over-voltage times and electrical insulation strength (air spacing) from the system major in places that the public not easy to arrive.

再根据系统确定的操作过电压倍数及电气绝缘强度（空气间隙）来确定在人不宜到达地方的交叉跨越距离；

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Food import customs clearance, international luggage transport. China international Exhibition exhibitors cargo import clearance, international Electrical Engineering Equipment logistics.

食品进口清关，国际行李散货运输庄家，国际参展货物中国展览货物进口清关，国际大宗机电设备工程运输专家。

youdao

Food import customs clearance, international luggage transport. China international Exhibition exhibitors cargo import clearance, international Electrical Engineering.

食品进口清关，国际行李散货运输庄家，国际参展货物中国展览货物进口清关，国际大宗机电设备工程运输专家。

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