主桅下上帆
/ˈmeɪn ˈləʊə ˈtɒpɡalənt ˈseɪl/
n
English: main lower topgallant sail · 主桅下上帆
English · main lower topgallant sailEspañol · juanete mayor bajoFrançais · grand perroquet fixe avant
释义：Square sail between the main upper topgallant sail and the main upper topsail.