機器
aged
big
bolt
brown
closeup
connection
construction
corrosion
decay
detail
dirty
element
equipment
high
huge
industry
instrument
iron
jaws
light
mast
material
metal
nut
object
old
pole
rough
rust
scratch
screw
screwnut
sheet
solid
spanner
spiral
stadium
steel
structure
surface
technology
texture
textured
tool
unsuitable