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Different size, nature of products is suited to openings of different sizes, such as a bag of milk powder bags, people often will open a small opening, not only because it is easy to control the amount of poured-out products but also easy to store, but sometimes it's difficult to control the opening for this situation, bevel package bag taken bevel opening, while tearing at different sawtooth,the sizes of the openings of package bag will be different


Chengdu University of Technology

Chengdu University of Technology
chengdu, China

kou hanyu,
Chengdu University of Technology