see figure 1 for examples of кантовальные площадки
https://leg.co.ua/info/pogruzochno-razgruzochnye/kantovalnye...

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upender кантователь, кантовальный станок
https://textarchive.ru/c-2377057-pall.html

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In situations where you wish to upend a load that is not unitized (e.g. a pallet load of multiple cartons, etc.) make sure that the load is secured and banded prior to upending. Do not place and straps or chains across the rolling surfaces of the upending platform.
https://www.bushman.com/wp-content/uploads/files/pdf/floor-b...