英文關鍵字
animation
army
arrest
barb
barbed
barbwire
barrier
black
border
boundary
camp
cartoon
chain
concept
crime
danger
defend
defense
fence
forbid
forbidden
freedom
guard
icon
iron
isolated
jail
line
metal
military
motion
prison
private
property
protect
protection
safety
seamless
security
shape
sharp
spike
spiral
steel
stop
wall
war
warning
white
wire
zone