機器
ball
box
car
communication
component
connection
crank
defocused
engine
engineering
equipment
gear
gearshift
group
hammer
industry
iron
land
level
machinery
material
mechanic
metal
part
pliers
power
repairing
section
serrate
serrated
service
spare
steel
surface
technology
tools
torque
transportation
turning
utility
vehicle
wheel
workbench