BE539522A - - Google Patents

Info

Publication number
BE539522A
BE539522A BE539522DA BE539522A BE 539522 A BE539522 A BE 539522A BE 539522D A BE539522D A BE 539522DA BE 539522 A BE539522 A BE 539522A
Authority
BE
Belgium
Prior art keywords
less
powder
essentially
threads
appearance
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE539522A publication Critical patent/BE539522A/fr

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/54Accessories
    • G03B21/56Projection screens
    • G03B21/60Projection screens characterised by the nature of the surface

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Woven Fabrics (AREA)
BE539522D BE539522A (2)

Publications (1)

Publication Number Publication Date
BE539522A true BE539522A (2)

Family

ID=169204

Family Applications (1)

Application Number Title Priority Date Filing Date
BE539522D BE539522A (2)

Country Status (1)

Country Link
BE (1) BE539522A (2)

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