英文關鍵字
line
icon
animation
set
industry
electricity
price
purchase
power
plant
energy
alternative
generate
producing
consumption
combustion
processing
contamination
emission
factory
payment
bill
linear
motion
graphic
pictogram
hd
video
thin
logo
outline
loop
art
contour
drawing
animated
illustration
concept
web
symbol
flat
lineart
isolated
design
sign
item
dynamic
simple
dark