Brick Production Line 1. Hydraulic control 2. Hollow, proous, standard brick ... of customers. QT12-15 (12 stands for the production of hollow blocks, like 390*190*190mm is 12 ... pieces every mould,and 15 stands for every cycle needs about 15 seconds). ... , such as hollow brick, standard brick and porous brick, etc.4. Reasonable and compact structure, stable working, saving space. ...