What are the correct descriptions of Rings Mains?
A、Usedindistributionsystemforareasupplies.
B、Useslesswireusedthanparallelfeeders.
C、Continuityofsupplyismaintainedifonefeederislost(Hotbackup).
D、Alsousedinsub-transmissionsystemsforlightlyloadedruralareas.
发布时间：2024-09-29 03:51:24
