機器
automatic
blow
blow up ratio
blown film process
blue
clean room
conveyor
die head
engineering
equipment
extrude
extruder
extruder machine
extrusion
factory
industrial
industry
machinery
manufacture
manufacturing
metal
output
plant
plastic
plastic bag
plastic bag industrial
polyethylene
polyethylene film
polypropylene
process
processing
product
production
production process
roll
single layer
structure
supplier
technology
tool
transparent
work
workshop