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  MerchantMarine

Sigma KEE - MerchantMarine

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商船
MerchantMarine is a class of Collections of Ships, each collection belonging to a particular Nation or GeopoliticalArea, in whose ShipRegister the member ships are enrolled. For example, the merchant marine of France.
Relationships      
Parents 群体 Collections have members like Classes, but, unlike Classes, they have a position in space-time and members can be added and subtracted without thereby changing the identity of the Collection. Some examples are toolkits, repeated actions, football teams, and flocks of sheep.


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