英文關鍵字
abstract
accuracy
aircraft
airplane
animation
aviation
background
big
blade
chrome
clock
clockworks
cog
cogwheel
communication
connect
connection
construction
device
engine
engineer
engineering
equipment
factory
fan
gear
gearbox
industrial
industry
inspiration
instrument
iron
jet
machine
machinery
materials
mechanic
mechanism
metal
metallic
motor
plane
power
rim
roll
rotate
rotation
turbine
turbo
vane