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How to check the performance of the clip chain?

The performance test method of the clip chain is as follows: 1. The clip chain cooperates. Use the thumbs and forefingers of both hands to clamp the two sides of the opening and pull outwards. The clutch between the convex edge and the groove should not be too loose, and the opening edge should not be stretched and deformed. 2. Open the outer opening of the pulling force: Use the thumbs and index fingers of both hands to clamp the opening on both sides and pull outwards. To pull out, judge the pulling force of the inner and outer openings by the feel. 3. Repeated use, open and close by hand no less than 20 times. More YLTpacking packaging bag technology:

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