中華人民共和國國家標準
NATIONAL
STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 20501.6-2013
Public information guidance systems - Design principles and requirements for guidance elements - Part 6: Direction sign 公共信息導向系統 導向要素的設計原則與要求 第6部分:導向標志
Issued Date:2013-07-19
Implemented Date:2013-11-30
Issued by:
The Standardization Administration of the People's Republic of China