英文關鍵字
antenna
antennas
base
cell
cellular
communication
connection
coverage
data
digital
evening
footage
frequency
industrial
industry
internet
lapse
microwave
mobile
mobility
morning
nature
network
node
phone
power
radio
repeater
roaming
signal
signalling
silhouette
sky
spectrum
station
steel
structure
sunset
technology
telco
telecommunication
time
tower
transmission
transmitter