機器
adjustment
assembly
auto
background
belt
bench
bike
blank
boats
centrifugal
chainsaws
clutch
combustion
copy
crankshaft
cycle
disassembly
disc
disk
drive
drum brake
engine
engineering
garage
gokarts
hand
in
internal
japan
machinery
made
maintenance
mechanic
mechanical
mechanics
metal
moped
motor
motorcycle
part
plates
repair
scooter
space
technology
test
tool
transportation
white