機器
bucket
cable
check
communication
connection
crane
current
danger
electric
electrical
electrician
electricity
elevator
energy
engineer
engineering
equipment
helmet
high
lift
light
line
lines
maintenance
man
megawatt
occupation
people
pole
power
powerline
professional
repair
repairman
safety
service
silhouette
sky
supply
system
technician
technology
transformer
transmission
volt
voltage
wire
work
worker