... Description QT4-20C semi-automatic hollow block making machine This semi-automatic hollow block machine is a practical machine that simple in structure, ... Overall Power24kwRaw Materialscrushed stone, sand, cement, dust and coal fly ash, cinder, slag, gangue, gravel, ... products, paving stones with or without face mix, garden and landscaping products, slabs, edgers, kerbstones, grass blocks, slope ...