内河通航标准 inland waterway navigation aids: 内陆水道助航标志inland waterway navigation and pilotage: 内陆水道航行及领航standard for navigation of inland river: 内河通航标准inland waterway: 内陆河; 内陆水道; 内陆水路navigation waterway: 航道下载手机词典可随时随地查词查翻译