?横帆船后桅下桁的帆

... crossingmark过河标 crossjack横帆船后桅下桁的帆 crossoverassembly跨接装置 ...

?后桅底桁帆

... 十字头式引擎crossheadtypeengine 后桅底桁帆crossjack 后桅下桁crossjackyardorcrossjack ...

?后桅主帆

... 后桅之帆桁 mizenyard 后桅主帆 cross jack; crossjack 后桅主横帆 mizzen course ...