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Authors
Wang, Qing-Liang
Chen, Yun-Tai
Cui, Du-Xin
Wang, Wen-Ping
Liang, Wei-Feng
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Article History
Received: 31 December 1999
Revised: 2 September 2000
Accepted: 19 September 2000
First Online: 24 June 2014
Free to read: This content has been made available to all.
