短语词组短语haha assignor 转让人Copyright Assignor 版权让与商Booking Assignor 船务文员Assignor Estoppel 让与人禁止反言assignor r 转让人;让与人;出让人assignor estoppel doctrine 让与人禁反言assignor assigning authorities 船舶检验机构assignor transferor transferrer 让与人 返回 assignor