Travertine, scientific name is travertine, English name: (Travertine) is a kind of porous rock, so people usually call it travertine. Travertine is a continental sedimentary rock that is a deposit of calcium carbonate. Most of the travertine is formed on the limestone-rich limestone topography, which is formed by depositing calcium carbonate and other minerals dissolved in water on the riverbed, lake bottom and other places. Since there are occasional voids in the process of heavy accumulation, and because its main component is calcium carbonate, it is easily dissolved by water, so many natural irregular holes appear in these deposits. Hospital Elevator,Escalator Brand Name,Best Hospital Elevator,Elevator Price MAURER TECHNOLOGIES CO., LTD. , https://www.maurer-elevator.com