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The ornamental design for a ship propeller duct, as shown and described. |
FIG. 1 is a view in rear perspective of the ship propeller duct.
FIG. 2 is a view in front perspective thereof.
FIG. 3 is a view in cross-section of the ship propeller duct.
FIG. 4 is a view in side elevation of FIG. 3.
The broken line disclosure of a propeller and shaft is for illustrative purposes only.
Meyerhoff, Leonard, Meyerhoff, Stanley A.
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