... Strength. Product introduction: 1. QTJ4-20 Hydraulic Automatic Baking-Free Brick Machine is an equipment involving mechnical,hydraulic and electrical control systems ... operating and convenient maintenance. 2. For the product forming,then machine takes the hydraulic focre as the main and the mechanical ... the way, for QTJ4-20, It includes 1 set host machine, 1 set conveyor belt of 7 meter, and 1 set ...