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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
E04G15/00—Forms or shutterings for making openings, cavities, slits, or channels
E04G15/04—Cores for anchor holes or the like around anchors embedded in the concrete