The Design of Follow-up Hydraulic Muffler Based on Spring-Damp Regulating DeviceChang-ji Shan, Yi-duo Bian, Ting-ting Dai, Cai Yan, Guo-fang Du and Hai-tao YangE3S Web Conf., 79 (2019) 01006DOI: https://doi.org/10.1051/e3sconf/20197901006