Explanatory notes
… felting, etc., or for use as filtering, insulating, packing, etc., materials). Crude asbestos fibres or those … slag, aluminium oxide, glass fibres, cork, etc., used as packing for heat-insulation purposes, or as filtering … be made by felting, spinning, twisting, plaiting, weaving, making up or moulding. For a description of crocidolite …