... ; 2. reliable working conditions; 3. ISO 9001:2000 certificate QT4-20 semi automatic cement brick making machine Hollow fly ash ... bricks of different shape and specification.4. Technical Parameter of QT4-20 semi automatic cement brick making machine Model4-20Overall dimension ... 20,DSQT8-15, DSQT10-15, DSQT6-15A, DSQT4-15, DSQT6-15B, etc.We would like to provide high-quality equipment, competitive ...