機器
allen
bolt
chain
construction
dirty
electric
electrical
electrician
electricity
engine
engineer
engineering
equipment
fix
gear
greasy
hand
hex
hexagonal
industrial
industry
inspection
job
key
maintenance
manufacturing
mechanic
mechanical
mechanism
metal
motion
motor
nut
oil
plant
power
repair
repairman
roll
roller
screw
site
skill
spanner
steel
tool
work
worker
wrench