機器
background
bearing
belt
chain
cog
detail
dirty
drive
dust
engine
engineer
equipment
factory
gear
grease
greasing
heavy
industrial
industry
iron
link
lubricant
lubrication
machinery
mechanic
mechanical
mechanism
metal
metallic
motion
motor
oil
old
part
power
pulley
roll
rotate
rotation
rusty
serrate
shaft
sheave
steel
technical
technology
transmission
vehicle
wheel