英文關鍵字
monitoring
protection
surveillance
control
technology
private
safety
watch
camcorder
digital
lens
vision
video
circuit
monitor
observe
privacy
protect
secrecy
watching
property
asset
detection
detector
innovation
operating
penalty
police
recording
safeguard
crime
dome
equipment
interior
isolated
observation
safe
secure
caution
secured
camera
record
store
information
electronic
security
system
alarm