英文關鍵字
adjuster
bell
box
cable
check
communication
communicative
connect
connecting
control
distribution
door
doorbell
electrician
electronics
entrance
entry
entryphone
equipment
fiber
flat
hand
handset
home
house
identity
inter
intercom
interline
interphone
modern
mount
open
optical
packaging
phone
pick
probe
protection
ring
safety
security
signal
system
technician
technology
telecommunication
terminal
urban
wire