上部構造
area
background
barbwire
barricade
barrier
boundary
building
building walls
concrete
curtain wall
dangerous
delineates
division
drawing
drywall
exterior boundary walls
fence
fenced
gate
gated
graphic
illustration
image
isolated
loadbearing
panelling
partition
pointed
post
protection
protects
retaining walls
science
scientific
sections
separates
separation
sharp
solid
space
standing
structure
vertical
white