Doors or covers specially adapted for smoke-boxes, flues, or chimneys

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Fittings for chimneys or flues (side-supporting means for chimney stacks E04H12/20; ladders permanently attached to chimneys E06C9/00; draught-inducing apparatus associated with chimneys or flues F23L17/00; tops for chimneys, terminals for flues F23L17/02) > Doors or covers specially adapted for smoke-boxes, flues, or chimneys