英语词汇“three-position upper-quadrant semaphore”的翻译、意思、用法、释义-英汉汉英双解词典

单词	three-position upper-quadrant semaphore
释义	three-position upper-quadrant semaphore 三位式上向臂板信号; 三位式上向臂板信号机
随便看	girder load girder making machine girdermanufacturing plant girder method girder mill Girder model girder moment girder mould girder numeral girder of airscrew girder ofreinforeed eoncrete girder part girder parts girder rail girder rail longitudinal interac-tion girder replacement girders girder sclerenchyma girder section girder-shaped girders in frame girder space girder span girder spindle girder-staff structure