英文關鍵字
adult
bearded
conversion
electric
electrical
electrician
electricity
elt
emotional
energy
engineer
equipment
hardhat
industry
inspector
installation
lep
lines
male
man
metal
network
outdoors
phonecall
power
professional
safety
smiling
speaking
steel
sunset
supply
talking
technician
technology
tension
towers
transmission
voltage
work
worker