機器
air
aircraft
airplane
aviation
blade
circle
commercial
design
detail
energy
engine
engineer
engineering
equipment
fan
flight
flying
frame
generation
gray
horizontal
ideas
industrial
industry
iron metal
jet
large
machine part
material
mechanical
metal
metallic
motor
nobody
part
plane
power
propeller
reliability
rotor
speed
steel
technology
transport
transportation
turbine
vehicle
white