英文關鍵字
automatic
builder
check
circuit
construction
electric
electrical
electrician
electricity
enclosure
energy
engine
engineer
equipment
fuse
industrial
industry
inspecting
installation
labor
laborer
line
male
man
manufacturing
one
plug
power
production
professional
repairing
repairman
safety
specialist
switch
system
technical
technician
test
transformer
unrecognizable
voltage
wired
work
worker
young