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1 Department of Mechanical and Aerospace Engineering, Cornell University, 124 Hoy Road, Ithaca, NY 14850, USA. rfs247@cornell.edu.
2 State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, P. R. China. znie@fudan.edu.cn.
3 Reconfigurable Robotics Lab, Ecole polytechnique federale de Lausanne, MED 11326, Station 9 CH-1015 Lausanne, Switzerland.
1 Department of Mechanical and Aerospace Engineering, Cornell University, 124 Hoy Road, Ithaca, NY 14850, USA. rfs247@cornell.edu.
2 State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, P. R. China. znie@fudan.edu.cn.
3 Reconfigurable Robotics Lab, Ecole polytechnique federale de Lausanne, MED 11326, Station 9 CH-1015 Lausanne, Switzerland.