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Priority to JP1975010694UpriorityCriticalpatent/JPS5428308Y2/ja
Publication of JPS5193123UpublicationCriticalpatent/JPS5193123U/ja
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Publication of JPS5428308Y2publicationCriticalpatent/JPS5428308Y2/ja
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
E04G15/06—Forms or shutterings for making openings, cavities, slits, or channels for cavities or channels in walls of floors, e.g. for making chimneys