| 摘要 |
A gravimetric metering apparatus with a constant throughput is enclosed inside a sealed chamber and connected through the wall of the chamber, by a first pipe, to a pneumatic conveyor line operating under a pressure of n bars and, by a second pipe, to an intermittentently operated external loading hopper. The chamber is filled with gas under a pressure of n bars which is equal to that inside the pneumatic conveyor line. |
