| 摘要 |
A watercraft comprises a hull having an outer surface below water-line with an inwardly indented cross-channel extending from one side to the other of the hull. A propeller is rotatably mounted within the cross-channel and oriented to direct a flow through the channel from one side of the hull to the other. In addition a conduit which defines a pressure equalizing passage extends through the hull from the outer skin on one side thereof to the cross-channel and advantageously another pressure equalizing passage extends through the hull from the exterior on the opposite side to the cross-channel.
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