煤炭与化工
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Structure study of pine needle
Xu Yuanyuan1, Rong Yuan1, Cong Fei2, Wang Xueqi1, Zhang Rui1, Li Yazhao1, Liu Haoyu1
1. Shijiazhuang University, Shijiazhuang, 050035, China; 2. Pingdingshan Forest Farm, Management of Fengning
State-owned forest farm, Chengde 068350, China


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