機器
access
accessibility
alarm
authorized
business
businessperson
card
closeup
code
control
device
door
electric
electronic
emergency
entrance
entry
finger
hand
holding
home
human
identification
insert
key
keycard
keycode
keypad
lock
metal
office
panel
password
people
person
privacy
private
protect
protection
remote
safe
safety
secure
security
system
technology
unlock
unlocking
wall