In July 2010, the Chinese government sent a chill through the world's high-technology industries when it announced a 37% cut in export quotas for rare-earth elements — a group of 17 metallic elements that are essential ingredients in display screens, low-energy lighting, high-powered lasers and a host of other twenty-first-century products.

téléchargement

 

Anvredet

 

Atrst

 

Atrss

 

Atrssh

 

Atrsnv

 

Atrbsa

 

Use the site search

On line documentation

National system of on line documentation.


Articles by date

« July 2020 »
Mon Tue Wed Thu Fri Sat Sun
    1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31    

Online

We have 413 guests and no members online

University Frères Mentouri Constantine 1

University Frères Mentouri Constantine 1  P.O. Box, 325 Ain El Bey Way, Constantine, Algeria, 25017, Phone Number : +213 (0) 31 81 12 71