機器
background
bearing
closeup
cogwheel
construct
construction
crire
design
drop
engineering
equipment
factory
frame
gear
gears
gold
group
grunge
hardware
hole
industrial
industry
iron
machinery
mechanic
mechanical
mechanism
metal
metallic
object
old
part
round
rust
rusty
screw
set
stack
steel
structure
technical
technology
teeth
texture
tool
vintage
water
welding
wheel
work