... specifications of QT12-15 automatic hollow cement brick making machine Dimension9350*2520*2950mm-QT12-15 hydraulic brick ... Frequency2800-4500HzPallet Size1300*900mmMolding Cycle15-25SOverall Power46kwRaw Materialscrushed stone, sand, cement, dust and coal fly ash, cinder, ... of QT12-15 automatic hollow cement brick making machine ItemSpec sizeQuantity per moldCycle mouldingPer hPer dHollowbrick400* ...