| 摘要 |
Injection of particulate materials (12) into industrial pro-cesses (14) can be improved through use of a vessel (16) mounted on a weighing device (18) and which is vented through use of two separate and distinct valves (78, 82). Optionally, a predetermined pressure in the vessel (16) is maintained through use of a pressure transmitter (66) and an on/off mode (28) of operation.
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