YZ/Z 0021-2001
Application Layer Protocol of Express Mail Tracking and Inquiry System and Information Center Information Exchange Processing System (English Version)

Standard No.

YZ/Z 0021-2001

Language

Chinese, Available in English version

Published By

Professional Standard - Postal Service

Latest

YZ/Z 0021-2001

YZ/Z 0021-2001 history

• 1970 YZ/Z 0021-2001 Application Layer Protocol of Express Mail Tracking and Inquiry System and Information Center Information Exchange Processing System