Catholic Ming Yuen Secondary School (CMYSS Web album) :: 20120426-科學學會_化學氣泡火箭 :: 20120426-gasrocket-05
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www.fotop.net 天主教鳴遠中學 網上相簿 1950-20162011-20122012-0420120426-科學學會_化學氣泡火箭  
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