機器
accessibility
aero
air
aluminum
box
business
car
circle
commercial
component
construction
electric
electronics
energy
engine
engineering
equipment
flying
generation
industrial
industry
jet
material
metal
metallic
mode
motor
open
part
physical
plane
power
pressure
propeller
reliability
repairing
section
snow cannon
snowgun
spinning
steel
technology
thruster
transport
transportation
turbine
turning
vehicle