... the premium raw materials the have.Applications:1,A concrete grinder and polisher is for grinding and polishing on surfaces ... ,epoxy,stone,marble,granite,terrazzo,etc.2,A concrete grinder and polisher s for old floor removal,restoration,renovation, ... Quantity per 20GP:16sets Pictures: Customers' project using our concrete grinder and polisher ( PetroChina project)Before grinding and polishing:JS ...