English term (edited): Fluting. Testliner

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Note added at 17 mins (2022-12-27 10:37:00 GMT)
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Fluting
تخديد/خدد
https://www.merriam-webster.com/dictionary/fluting


Testliner
Test liner paper is: Kraft liner is a paper which can be produced with 80% to 100% (virgin or first hand) pulp. If we produce paper which is made of 100% recyclable paper, it is called liner, and if it has two layers, it is called test liner.
https://wiedemanntech.com/what-is-test-liner-paper-and-test-...




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Note added at 20 mins (2022-12-27 10:39:20 GMT)
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Fluting Paper
Fluting paper is the middle liner of corrugated board, which may be supplied individually as a type of protective packaging. It provides protection by filling empty spaces in the outer case and providing a cushioning effect for the primary product.






https://www.dubaicustoms.gov.ae/ar/PoliciesAndNotices/Notice...
https://www.gcc-sg.org/ar-sa/GeneralSecretariat/SectorsSites...
https://www.ajmanchamber.ae/media/publications/Australia - T...
https://www.pgpaper.com/types-of-packaging-paper/