英文關鍵字
accessibility
alarm
alarms
architecture
authority
bodyguard
building
buildings
burglar
business
businessman
button
coding
combination
computer
control
danger
dialing
digital
display
door
emergency
entering
entrance
entry
equipment
feature
finger
fire
hand
handle
home
horizontal
house
household
human
indoors
intercom
interior
keyboard
keypad
leaving
lock
locking
males
natural
number
object
objects
occupation
occupations
open
order
panel
part
password
projection
protection
push
pushing
safe
safety
screen
security
sensor
services
sign
staff
surveillance
system
technology
thumb
touching
unlocking
variation
various
visual
wall