… of asbestos with magnesium carbonate, cellulose fibres, sawdust, pumice stone, talc, plaster, siliceous fossil … beaten, carded and then spun. As asbestos fibres cannot be drawn, long fibres are used for spinning, while the shorter …
… of this group are obtained by moulding or casting, or by sawing, cutting or otherwise working the raw material. They may be drilled, threaded, filed, grooved, …
… charge in the inner tube is ignited by the tearing out of a saw-toothed wire and thus fires the charge of powder between … metal diaphragm. When the ampoule is broken the acid eats away the metal diaphragm (which serves as a delay element) …
… or otherwise trimmed with various materials (wicker, straw, raffia, metal, etc.); they may also have tumbler-caps … banded, etc. (C) Ampoules, usually obtained from a drawn glass tube, and intended to serve, after sealing, as …
