US PATENT SUBCLASS 209 / *
.~ Plane sifters


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

233  DF  SIFTING {16}
*.~ Plane sifters {2}
*  DD  .~.~> Horizontal and inclined {4}
359  DF  .~.~> Vertical {2}