... 5000pcs/day 3)CE.CB.ISO9001,14001 PC plugs, sockets and couplings are constructed for extreme operating conditions.They are of ... machine industry, crane industry, construction industry, trains and cars. The cases and inlets are made of high-grade plastic nylon 66 ... same system of other manufacturers, through groove and tongue, jointfor same polarity, and then it is installed easily through movable cable ...