, government of india ministry of information technology, government of india council of scientific and industrial research, government of india department of atomic energy, board of research in nuclear sciences, government of india university grants commission, government of india ministry of social...
, government of india ministry of information technology, government of india council of scientific and industrial research, government of india department of atomic energy, board of research in nuclear sciences, government of india university grants commission, government of india ministry of social...
several layers of nonwovens of man-made fibres, whether or not treated with activated carbon, with or without an exhalation valve, to be employed in a noxious atmosphere . . safety equipment and parts thereof cellulose/paper masks . . textile face-masks, without a replaceable filter or mechanical parts...
ukraine united arab emirates united kingdom united states united states minor outlying islands uruguay uzbekistan vanuatu vatican city state (holy see) venezuela vietnam virgin islands (british) virgin islands (u.s.) wallis and futuna islands western sahara yemen yugoslavia congo, the democratic republic of...
have provided the raw materials to meet our fibre needs. no matter which climatic zone humans settled, they were able to utilize the fibresof native species to make products such as clothes, buildings, and cordage. the use of composite materials dates from centuries ago and it all started with natural...