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How to calculate the length of pet packing belt

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length (m) = weight (g) ÷ width (mm) ÷ thickness (mm) ÷ specific gravity (1.38)

total weight (kg) – weight of paper core (kg) = net weight (kg)

net weight (g) ÷ weight per meter (g) = meters per roll (m)

people in Fuzhou of Xiamen Jiayin packaging company told me the method. You can go to them and ask them

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