AC cable, since the required lengths have not been sufficient to make DCcable economically feasible.
目前主要选择交流电缆，因输电的距离未足以使选择直流电缆在经济上可行。
2
It has a clever design which allows the DCcable to be wound neatly around itself for easy cable storage.
还有一个聪明的设计，可以把DC电线整齐地缠绕在上面，方便收藏。
3
Nowadays the introduction regarding the design of the DCcable is so poor that many people think the design of DCcable is the same as that of the AC cable.