英文關鍵字
dump
truck
stone
transportation
line
symbol
crushed
mining
heavy
machinery
excavator
railway
carriage
mine
equipment
linear
quarry
industrial
excavation
refinery
cargo
engineering
industry
mashed
crusher
drilling
rock
ore
transport
digging
labor
extraction
icon
motion
graphic
animation
pictogram
hd
animated
item
sign
black