... manual hollow block making machine, QTJ4-40 block machine Feature:1.A reformed machine on the base of former machine.2.With ... ,crushed stone,water etc.)---defined amount---mixer---main machine---nature conservation---stack conservation—quality inspection—sellTechnical parameter ... materialRiver sand,sea sand,cement,cobble,crushed stone,fly ash,cinder,slag,gangue,gravel,perlite etc.Brick styleHollow ...