Selection and evaluation of suitable tree species in dry and dusty mining areas of Northwest China von Zhu, Xiaofang, Cao, Bing, Zhao, Siming, Wang, Xing, Zhang, Hao, Gao, Deping, Duan, Yongfeng

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Analysis,Prediction and Process Optimization Concerning Ammonium Chloride Corrosion in Ebullated-Bed Hydrogenation Unit for Treating Residual Oil von Bao Zhenyu, Wang Ning, Zhang Hongfei, Duan Yongfeng, Yu Fengchang

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Removal of hydrogen sulfide from light oil with solid base von Duan, Yongfeng, Xiang, Yuzhi, Xia, Daohong

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Solid base for hydrogen sulfide removal in light oil von Duan, Yongfeng, Xia, Daohong, Xiang, Yuzhi, Zhang, Xiwen

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Corrosion behavior of austenitic stainless steel in refinery wastewater ozone treatment system von YANG Yanjia, WANG Xuefeng, SONG Yanda, LIU Chao, DU Yannian, ZHANG Hongfei, DUAN Yongfeng

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Lithium battery detection tool von DUAN YONGFENG

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Feeding device capable of conveniently adjusting feeding height von DUAN YONGFENG

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Photovoltaic cable winding device von DUAN YONGFENG

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Device convenient for transporting photovoltaic panel von DUAN YONGFENG

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Naphthenic Acid Corrosion Control Strategies in Refineries: A Review of Recent Patents von Duan, Yongfeng, Yu, Fengchang, Cui, Zhongqiang

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Clamping and overturning device for machining von DUAN YONGFENG

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Particle swarm optimization and its application to seismic inversion of igneous rocks von Yang, Haijun, Xu, Yongzhong, Peng, Gengxin, Yu, Guiping, Chen, Meng, Duan, Wensheng, Zhu, Yongfeng, Cui, Yongfu, Wang, Xingjun

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Circuit board detection mechanical structure von DUAN YONGFENG, BAI YUANLIANG

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Mechanical automatic grabbing mechanical arm von DUAN YONGFENG, BAI YUANLIANG

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New energy photovoltaic cell panel support von DUAN YONGFENG, LEI GANGMING

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Intelligence valve controlling device von DUAN YONGFENG

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Particle swarm optimization and its application to seismic inversion of igneous rocks von Yang Haijun Xu Yongzhong Peng Gengxin Yu Guiping Chen Meng Duan Wensheng Zhu Yongfeng Cui Yongfu Wang Xingjun

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Drawing showing stand with fixing mechanism for mechanical design von DUAN YONGFENG, BAI YUANLIANG, WANG JIAO

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Dampproof base of server cabinet body von DUAN YONGFENG, ZHAI GUOMING, ZHOU YUE, ZHANG XIAOHUI

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Novel dust-free environment-friendly paint spray booth von DUAN YONGFENG, LI DESHENG, SHI JINGTAO

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