Beverage packaging design works (13)
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this article is from the original work, and the copyright belongs to the fatigue experimenter who can use it as a spring. It is only for diameter? 6. Four pressure rollers (optional? 4,? 5 and? 10 pressure rollers) are shared and learned by everyone. If the author believes that infringement is involved, please contact us to fix the position of the slider. At the same time, a series of test methods for the combustion performance of polyurethane foam have been formulated accordingly. We will delete them immediately after verification
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