1.2012 hollow block machine for hot sales 2.high efficiency 3.High quality with lower rice zhengzhou shuliy machinery co.,ltd2012 hollow block machine for hot salesRaw material :Sand ,crushed stone,cement ,dust and coal fly ash,cinder,slag, gangue gravel and other industrial wastes.Applied products :concrete blocks,solid\hollow \cellular masonry products,paving stoned with or without face mix, ...