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Comparison of Methods of Sewage Purification ⠃⠗⠋ braille edition
Grade 2 — contracted English braille (EBAE-compatible subset). Translated on this server by our own braille engine (BRF — Braille Ready Format, Library of Congress fdd000551). View Grade 1 instead.
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39,020 braille cells · 40 embossed pages at 40×25 · 478 unrepresentable characters omitted
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