Multihammer synchronous vibration system.
Xin Lai, Wanjun Xie
CC BY 4.0
Xin Lai et. al. "Theoretical and Experimental Study on Electromechanical Coupling Properties of Multihammer Synchronous Vibration System", Shock and Vibration <a rel="nofollow" class="external text" href="https://doi.org/10.1155/2016/6707264">doi:10.1155/2016/6707264</a>