How to use the omnipotent amount of electricity leakage of the wire How to check whether the wire leakage
The bottom of the user's groove and the design of the tail and tail, so that the product will not move firmly at the bottom
Do not specifically do maintenance, will be miserable, with the point of doing the hardware or software sales can also do things such as Internet cafes system maintenance and wiring and the like, start the fund is not very high, only the accessories as long as the common model accessories There are on the line, maintenance test tools also can not spend much money.
