英文關鍵字
quartz
sand
mining
glass
production
line
symbol
plant
bottle
vase
jar
light
bulb
manufacturing
window
packaging
transportation
testing
equipment
smelting
factory
machine
windows
cooling
molding
conveyor
heating
packing
storage
cup
carrying
workers
truck
icon
motion
graphic
animation
pictogram
hd
animated
item
sign
black