英文關鍵字
assembling
box
building
cabinet
checking
circuit
construction
current
electric
electrician
electricity
engineer
equipment
fix
industrial
industry
inspecting
inspector
labor
laborer
maintenance
man
mechanic
mounting
panel
power
repairing
repairman
services
spanner
switch
technical
technician
test
voltage
wiring
work
worker
wrench
young