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Class Information
Number: 414/221
Name: Material or article handling > Apparatus for moving material between zones having different pressures and inhibiting change in pressure gradient therebetween > Including serially arranged valves in path having a vertical component (e.g., airlocks, etc.)
Description: Apparatus wherein the enabling and inhibiting means includes two or more successive valves, located in a path wherein the material moves under the influence of gravity, which cooperate one with another to receive, isolate, and release a quantity of material.
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