Source google image: https://i1.rgstatic.net/publication/324937530_Seismic_isolation_of_buildings_using_composite_foundations_based_on_metamaterials/links/5af06d8ea6fdcc24364702d8/largepreview.png
Isolation 1 € ain
Source google image: https://i1.rgstatic.net/publication/324937530_Seismic_isolation_of_buildings_using_composite_foundations_based_on_metamaterials/links/5af06d8ea6fdcc24364702d8/largepreview.png