carrier letter carrier mail carrier邮递员

outgoing surface letter mail出口平邮信件

american letter mail company美国邮政信件公司

outgoing air letter mail出口空邮信件

international electronic letter mail国际电子信函

Trays for international letter mail国际文字邮件格

Apparatus for stacking letter mail发明名称

mail letter邮寄信

letter sent by regular mail平信

letter sent by express mail快信