英文關鍵字
fan
blades
distortion
frequencies
rotating
fast
movement
optical
form
irregular
curved
parts
resonance
visible
waves
frames
physical
phenomena
nature
surrounding
space
frame
border
metallic
metal
lubrication
rotation
propeller
modern
white
light
object
bright
lamp
bulb
concept
blur
decoration
decor
electric
electricity
electronic
shutter
equipment
hanging
home
material
surface
steel
black