摘要
An expert group formed by three seniorengineers,Yu Chengzhou,Zhang Guochengand Li Guizhu of the Beijing General Re-search Institute of Nonferrous Metalsreturned home in early June after a vi-sit to Australia.Another three expertsand a commercial representative of theShanghai Yuelong Chemical Plant alsoFollowed the group.The visit was arrang-ed according to the contract signed byChina and Australia.Australia is abundant in RE
