機器
ancient
background
ball
ball bearing
bearing
broken
chock
closeup
component
corrosion
damage
decay
device
dirty
engineer
engineering
equipment
grease
grease stain
hardware
heavy
industry
iron
machinery
maintenance
mechanical
metal
object
oil
old
oxidation
part
pivoted
repair
replacement
roller
rolling
round
rust
rusty
rusty metal
service
steel
technical
technology
tool
vehicle
wheel