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From a circular plate, rotating around a vertical axis, a circular array of vertical blades ( in the shape of hydrofoils ) protrude out of the bottom of the ship.

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Promote Demote Fragment Fix

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From a circular plate, rotating around a vertical axis, a circular array of vertical blades ( in the shape of hydrofoils ) protrude out of the bottom of the ship.

Edit
Promote Demote Fragment Fix

+
From a circular plate, rotating around a vertical axis, a circular array of vertical blades ( in the shape of hydrofoils ) protrude out of the bottom of the ship.

Edit
Promote Demote Fragment Fix

0.033 seconds.