英文關鍵字
business
call
cctv
center
chief
communication
computer
computerized
control
crime
digital
futuristic
guard
headset
indoors
industry
inspector
internal
lcd
male
man
microphone
monitor
monitoring
office
online
operator
panel
people
person
personnel
professional
property
radio
record
remote
room
screen
security
service
spy
staff
supervision
support
surveillance
system
talk
technology
terminal
worker