For armoured or copper-tape-screened cable, not less than 12 times of cable diameter;

无铠装或铜带屏蔽结构的电缆，应不小于电缆外径的12倍；

youdao

For armoured or copper-tape-screened cable, not less than 12 times of cable diameter;

无铠装或铜带屏蔽结构的电缆，应不小于电缆外径的12倍；

youdao