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main royal sail /ˈmeɪn ˈɹɔɪəl ˈseɪl/ n

中文：主桅顶帆

中文 · 主桅顶帆Español · sobrejuanete mayorFrançais · grand cacatois avant
Meaning：Small square sail above the topgallant sail at the top of the mainmast.
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Four-masted ship sails

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