Zhengzhou LYA Trading Co,Ltd is a group enterprise which have specilised in studying ,producing and marketing Clay brick machine,Fly ash block machine, Roof tile machine and Concrete streets paver machine for more than 20 years.From JZ series non-vacuum extruder to JKY series vacuum extruders,samll hydraulic only transform to hydraulic & vibration technoligy,Our machines have broaden more than 30 varieties ,over 100 specifications and experienced a great technology reformation. Now we have ...