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Authors
Zhang, Qing
Li, Deling
Zhang, Hongxia
Su, Guixian
Li, Guanghui
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Funding
Funding for this research was provided by:
Bureau of Science and Technology of Hebei Province (CN) (16211234)
Department of Education of Hebei Province (ZD2015202, ZC2016028)
Tangshan Normal University (2016B02)
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