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