英文關鍵字
arm
background
blue
broadcast
building
built
cable
clothing
communication
communications
construction
denim
dish
electrical
engineer
engineering
equipment
fitting
foreman
hardhat
helmet
industrial
industry
installer
male
man
network
outside
people
person
protection
radio
receiver
roof
safety
satellite
signal
site
sky
station
sunset
technology
telecommunication
television
transmission
transmit
wireless
work
worker