The unit to base electrical plug permits instant valve unit replacement without disconnecting piping or wiring.
该单位的基础电器插头未经允许即时阀断开管道或电线单位更换。
2
Electricians in this unit group lay out, assemble, install, test, troubleshoot and repair electrical wiring, fixtures, control devices and related equipment in buildings and other structures.
Care must be exercised during installation and wiring of this unit to ensure that no connections are made from phases other than the one being used to power the instrument.