QT4-30 Semi-Automatic Concrete Block Making Machine QT4-30 block making machine is according to china's national conditions, combining the maiority of the new and old customers device improved design of a new machine with the production og high quality, durablity strong, high production efficiency, suitable for the production of various high strength environmental protection brick, chain blocks, color tile, parking lot grass brick, hollow brick, ets. QT4-30 making machine running automatically, using hydraulic transmission. double cloth, virbation pressure, height of the function of control, the exciting force. simple operation, easy maintenance and operation.