機器
boom lift
business
cable
connection
construction
crane
current
danger
dangerous
electric
electrical
electrician
electricity
electrification
energy
engineering
equipment
height
high
high voltage
industrial
industry
job
line
lineman
lines
maintenance
man
network
pole
poles
power
power lines
professional
rail
sky
structure
system
technician
technology
tool
transformer
voltage
wire
wiring
worker
workers