... JW-QTJ4-26 Block / Brick Raw Material: Concrete / Cement / Fly ash / Sandstone / Construction waste / Industrial solid waste, and so ... extensively using gravel, river sand, mine tailings, coal gangue, fly ash, slag, volcanic ash, expanded perlite and other materials.* ... distance, and takes the mechanical, microelectronics technology and electric drive as a integration. It can realize step-type control ...