generation equipment
generater & subsidiary , ...

transmission equipment
wire cable , insulator , pole & tower , ...

automatic industrial control
actuator component & organization , ...

communication equipment
microwave , fibre-optical , carrier , ...

safety protection
live working , burglar alarm , ...

construction & mend
routine attention , mend special , ...

direct current system
charging , storage battery , ...

mechanical equipment
general machine , basis accessory , ...

transformer equipment
transformer winding , high voltage switchgea , ...

protective relaying & automatic
protective relaying , automatic substation , ...

instrument
electricity instrument , heat power instrument , ...

information organization
enterprise information organization , office automation , ERP , ...

fire control equipment
fire risk alarm system , defend against particular , personal protecting , ...

routine using
electric , line , manpower , pneumatic , ...

routine material
electric material , insulation material , electric industrial alloy...