air-mail envelope
... air-lift mixer-settler 空气升液混合沉降器 air-mail envelope 航空信封 air-mail paper 航空邮件纸 ...
ENVELOPE AIRMAIL
... 470425 公文袋 ENVELOPE KRAFT PAPER W/STRING 470456 航空信封 ENVELOPE AIRMAIL 470516 铅笔 PENCIL FOR CARPENTER USE ...
airmail envelope
... self-addressed envelope写明姓名和地址的回信信封 airmail envelope航空信封 pay envelope工资袋 ...
供寄递航空信函的专用信封,为便于识别和邮局分拣邮件人员分拣,四周印有红蓝色相间隔的斜形花条。航空信封分邮资、邮制和非邮制三大类,贴有航空签条或加盖航空戳记的航空信函实寄封,亦属航空信封。