Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B07
SEPARATING SOLIDS FROM SOLIDS; SORTING
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B07B
SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
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2201/00
Details applicable to machines for screening using sieves or gratings
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B07B2201/02
Fastening means for fastening screens to their frames which do not stretch or sag the screening surfaces
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