StreetArtGlobeのインスタグラム(streetartglobe) - 1月9日 02時17分

Gyroscopic self-leveling pool table on the cruise ship "Radiance of the Seas" ? Dman3150 on Youtube.
As the ship moves the pool table adjusts so that the billiard balls don't move at all, even in rough weather. If you look closely you can see that the balls remain still as the table moves, enabling you to play in almost any conditions.

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