Presentation Ceremony of China Adolescents Science Technology Invention Contest 2007-10-14
The presentation ceremony of China Adolescents Science Technology Invention Contest of Hong Kong region was held 6 Oct 2007.
Presentation Ceremony of China Adolescents Science Technology Invention Contest 2007-10-14
The presentation ceremony of China Adolescents Science Technology Invention Contest of Hong Kong region was held 6 Oct 2007.
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