英文關鍵字
abstract
animated
animation
arrow
automation
background
benzene
building
business
button
car
chief
concept
construction
conveyor
design
diligence
direction
drudgery
electric
electricity
element
factory
flat
foreman
fossil
fuel
gas
glass
graphic
green
hard
icon
illustration
industrial
industry
instrument
isolated
money
move
pictogram
sign
simple
success
symbol
vector
way
web
white