英文關鍵字
actuator
adjustment
adult
assembling
builder
building
cable
cabling
checking
connecting
construction
development
electrical
electrician
electricity
energy
engineer
equipment
gas
gear
heat
house
industrial
industry
inspector
install
installing
laborer
layout
maintenance
man
mechanic
natural
panel
person
plumber
power
professional
real
repairman
room
switch
technician
tester
tool
troubleshooting
ventilation
wiring
work
working