英文關鍵字
pickaxe
coal
mine
tool
industry
fuel
fossil
work
rock
geology
dig
occupation
equipment
excavation
stone
underground
manufacture
line
icon
animation
linear
motion
graphic
pictogram
hd
video
thin
logo
outline
loop
art
contour
drawing
animated
illustration
concept
web
symbol
flat
lineart
isolated
design
sign
gif