機器
abstract
accessory
chrome
closeup
cogwheels
construction
detail
engineering
equipment
factory
gear
group
hardware
industrial
industry
iron
item
junk
junkyard
machinery
macro
mechanic
mechanical
mechanism
metal
metallic
object
old
part
parts
pile
repair
round
rust
rusted
rusty
screw
small
spin
stack
steel
technical
technology
teeth
texture
tool
transmission
wheel
work