機器
apprenticeship
ball
body
bronze
coarse
cover
deep
depth
development
dimension
drilling
engineering
fidelity
fixing
gear
hide
hole
improvement
industrial
length
maintenance
measure
measurement
mechanical
mend
metallic
movement
moving
part
perfection
precision
protection
pulling
renewal
renovate
renovation
repair
ring
rough
rugged
scale
steel
support
system
thick
tool
unit
volume
wheel