英文關鍵字
antenna
blue
border
broadcast
broadcasting
business
cell
cellular
cloud
communication
connect
connection
construction
dish
equipment
frame
frequency
industry
metal
microwave
millitary
mobile
network
object
phone
power
radio
receiver
repeater
rotating
satellite
signal
silhouette
sky
space
station
steel
structure
sun
tall
technology
telecommunication
telephone
television
tower
transmission
transmit
transmitter
tree
wireless