This website is designed in conformity with the obstacle-free principles. Speed keys are used in the website to facilitate the browsing of the website. The exhibit space is divided into three zones: the main menu zone at the top, the content zone at the center, the related information zone at the bottom.
The following keys are set as the Access keys ( or speed keys) of this website.
Alt+U：The top navigation zone links to NMNS web service.
Alt+B：The inside page provides a path to the current page located on this site.
Alt+C：The main content zone.
Ctrl+P：Print the main content zone.
Alt+Z：The copyright information zone, which location at the bottom of this website.
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