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A vessel puts into the port of Kobe，Japan to discharge cargo. While awaiting completion of the cargo operation，the vessel contracts with a local shipyard to have the hull chipped，scaled，and painted. How is the cost of this maintenance handled with the Collector of Customs?（）
A:A declaration is required and duty is involved on the total cost
B:No declaration is required since this is considered routine maintenance
C:A declaration is made and duty is charged on the materials only
D:A declaration is made，but duty is charged on the labor only

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出自：海船船员证

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