英文關鍵字
abstract
aluminum
backdrop
background
chrome
circle
cogwheel
component
concept
cooperation
dark
design
dirty
element
engine
engineering
enviroment
equipment
factory
gear
grate
gray
grey
grid
grill
group
hard
heavy
high
hole
industrial
industry
iron
lines
loopback
machine
machinery
material
mechanical
mechanics
mechanism
metal
metallic
modern
movement
perforated
plate
pollution
power
preciseness
precision
reflection
rim
roll
rotate
rotation
rough
round
seamless
set
shape
sheet
shiny
silver
solid
spinning
stainless
steel
texture
textured
turn
wall
wallpaper