· some railroad channel three electricity project construction organization plan · Maoming some synthesis building fire prevention alarm system plan of construction · Chengdu some hotel weak electricity system design plan · electric wire electric cable and the appendix knowledge question and answer · communications cable line to the electric capacity not balanced test method · copper coated aluminum wire's in local service electric cable application · based on the blue tooth technology's intelligent housing network design research · optical fiber, the fiber optics and the communications cable related standard formulation's present situation · digital communication cable echo loss and the structure return loss's discrimination · discusses the local area network six kind of data symmetrical communications cable shallowly