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Acknowledgements
This work was supported by National Key R&D Program of China (Grant Nos. 2018YFB1305400, 2017YFB1302301) and Joint Research Fund (Grant No. U1713201) of NSFC and Shenzhen.
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Zhang, Z., Fan, J., Jin, H. et al. Active knee joint exoskeleton for stair ascent augmentation. Sci. China Inf. Sci. 64, 139204 (2021). https://doi.org/10.1007/s11432-018-9767-6
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DOI: https://doi.org/10.1007/s11432-018-9767-6