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B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01D—SEPARATION
B01D41/00—Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids
B01D41/04—Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids of rigid self-supporting filtering material
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FR337725D1902-12-151903-12-14
Method and apparatus for reducing the section of hollow bodies
ExpiredFR337725A
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