United States Ship美国军舰 United States Senate美国参议院 United Seamen's Service曼联船员的服务 United States Standard美国标准 United States Steamer美国轮船 Unsynchronized System3 .系统 Universal Support System通用支持系统 United States Steel美国钢铁 United States Swimming美国游泳 Ultrasound Scan超音波扫描 Ultrasonic Soldering超声焊 Union Syndicale Suisse (Swiss Federation of Trade Unions)瑞士Syndicale联盟(瑞士总工会) Unique Support Structure独特的支撑结构 United State Standard美国国家标准 United States Survey美国的调查