英文關鍵字
access
alert
building
button
buttons
buzzer
call
calling
control
design
dialogue
display
doorbell
doorphone
enter
entering
entry
equipment
finger
fingers
hand
identity
intercom
key
keyboard
keypad
modification
number
numbers
numeric
old
open
panel
person
press
pressing
push
pushbutton
pushing
safety
speakerphone