US PATENT SUBCLASS 209 / *
.~.~ Movable bed

Current as of: June, 1999
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209 /   HD   CLASSIFYING, SEPARATING, AND ASSORTING SOLIDS

422  DF  STRATIFIERS {6}
*  DD  .~ With liquid treatment {3}
*.~.~ Movable bed {3}
*  DD  .~.~.~> Permeable {2}
428  DF  .~.~.~> Belt {3}
*  DD  .~.~.~> Chutes and tables {4}