Robuta

https://patents.google.com/patent/CN106978854B/en CN106978854B - Friction-lasso composite energy-dissipating fabricated steel beam-column system... The invention discloses can multi-level damping the compound energy-dissipating type assembled steel post and lintel system of friction-lasso trick, the... energy dissipatingfabricated steelfrictionlassocomposite