| 摘要 |
Particulate dry product of more-or-less fragile nature, such as pelletized catalysts, is transported by suction in an air stream to a vibrating screen system and the classified particles caught by the screen or screens are directed through air lock devices to collection receptacles. The air and fine material which pass through the screens continue in the closed system through further separating devices for dust and fine particles and thence through the suction pump.
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