... 3.Variety of raw materials 4.Easy maintenance HJK-50 Clay brick making machine,Double stage vacuum extruder This machine ... style.It is applicable to many sorts of materials.Its features are novel structure,advanced technology,high ... ash, slag, mountain mud, silt, etc. as raw materials to carry out a strong mixing, vacuum processing, and ... me. HJK-50 Clay brick making machine,Double stage vacuum extruder