英文關鍵字
background
broadcast
building
cable
caucasian
channels
communication
communications
construction
contractor
day
dish
electrical
engineer
engineering
equipment
fix
foreman
hardhat
helmet
house
industrial
industry
installation
installer
ladder
male
man
network
outside
people
person
pole
radio
receiver
roof
safety
satellite
site
sky
station
technology
telecommunication
telephone
television
transmission
transmit
wireless
work
worker