... Pass CE,ISO,CHIAN WELL-KNOW MARK 2.Full automatic working 3.Panasonic PLC& Frequency invertor control QT10-15 ... double hoppers, it can produce pavers with double colors) Fully automatic production line Applied Products:concrete blocks, solid/hollow/cellular masonry ... slope blocks, interlocking blocks, etc. Raw Materials:crushed stone, sand, cement, dust and coal fly ash, cinder, slag, gangue, gravel, ...