Design of a New Type of Automatic Stair Climbing Wheelchair by Zhu Hua, Wang Zhou, Xia Zaiyan, Zhou Wei, Cai Pengbo

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Spatio-temporal evolution and driving forces of urban gravity centers and ecological security risk gravity centers in China by Peng Chen, Jiaojiao Duan, Yihan Wang

Subjects: “…Urban Gravity Centers…”
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Calculation Method of Gravity Center and Moment of Radial Gate by LAN Qin, DUAN Dongxu, LIAO Yuhai, CHENG Zhong

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Spatio-Temporal Evolution of Water Consumption and Water Utilization Structure in Pearl River District by XUE Jiao, LIU Xiyan, XU Zheng, HAN Yaxin

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