HdkfAddtime：2015/3/27 

hdkf (CableDistributionBox) a used to tap, branch, and the subsequent conversion circuit device on the cable line, mostly for outdoor. The equipment in our country the use of time is not long, the personage inside course of study of electric power system and department awareness and understanding of it is not consistent, especially of a quote from abroad European and American plug devices, such as the existence of different views.