英文關鍵字
alarm
bar
biometric
business
card
check
checkpoint
code
control
defence
defense
departure
detector
door
electronic
equipment
flight
gate
guard
hand
identification
laser
led
male
man
metal
metro
officer
pass
passenger
passing
passport
plastic
prohibition
protection
safety
scan
scanner
scanning
security
signal
stadium
subway
system
technology
terminal
tickets
transportation
travel
vacation