This is a demonstration of processing a paper tube into a heat shrink tube using a carbon ring heater.
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Related page:
Heat shrink tube processing of copper tube 
Heat shrink tube processing of glass tube 
Heat shrink tube processing of resin rods 
Heat shrink tube processing of thin small bamboo 
Heat shrink tube processing for electric wires 
Heat shrink tube processing of PVC pipe 
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Heat shrink tube processing of aluminum pipe