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E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
E04G23/00—Working measures on existing buildings
E04G23/002—Arrangements for cleaning building facades
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FR450128D1912-11-041912-11-04Procédé de ravalement de la pierre par la pierre
ExpiredFR450128A
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