| 摘要 |
Solid/liquid mixtures, such as cement, are made to a predetermined density and at a predetermined rate, by controlling the admission of liquid and solid to a conduit (2) using valves (6,8) controlled by a data acquisition and control means (38), utilising a measured flow rate (8) of the liquid (measured in device 28) and a measured density of the mixture (measured in device 34). |
