機器
automobile
clockwork
closeup
cog
cogwheel
complex
connection
cool
eccentricity
engine
engineering
equipment
extreme
gear
grey
industrial
iron
lubrication
machinery
manufacture
manufacturing
master
mechanic
mechanism
metal
metalwork
muzzle
nozzle
oil
pinion
precision
production
quality
repair
rod
rotation
service
shiny
slippery
snout
steel
system
technology
tester
tool
tooth
wheel
workshop