機器
bolt
bolts
closeup
component
components
container
detail
drive
dust
dusty
enduring
engineer
engineering
engineering gear
fabrication
gear wheel
grease
greasy
grime
grunge
grungy
hard
hardness
industrial
industry
lathe
lube
lubricant
lubricating
lubrication
machinery
macro
mechanical
metal
metalworking
milling
notch
oil
pinion
power
precision
shavings
tool
tooling
tools
turnery
work
workshop