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discussed below. poly(propene) is one of the lightest thermoplastics (density g cm- ). it has a melting point of k and a crystallinity of ca - %. the polymer, unlike poly(ethene), is transparent. structure of the polymer the propene molecule is asymmetrical, and, when polymerized, can form three basic chain...
etching copper is a soft metal with very high electrical and thermal conductivity. at qualitetch, we can etch detailed designs into a range of copper and beryllium copper metals.due to the high conductivity of copper, the metal is used mostly in the electrical, automotive and transmission industries...
etching copper is a soft metal with very high electrical and thermal conductivity. at qualitetch, we can etch detailed designs into a range of copper and beryllium copper metals.due to the high conductivity of copper, the metal is used mostly in the electrical, automotive and transmission industries...
mine in peru china seen as cushion for softer copper prices china's gold consumption and production reach new records china's steel sector warned of continuing overcapacity copper and ore glut in china sparks concerns short news minerals citic pacific criticizes palmer in australian iron ore dispute...
transportation infrastructure whether it is the six billion tons of steel found in the u.s. national highway system; the molybdenum used to harden steel for large-scale building projects; the zinc coatings that protect steel from corrosion; the kyanite that insulates power and phone lines; or the copper...
% of the global copper output. chilean mining accounts for % of chile's mining gdp and % of its exports in . over the last three decades mining investments totalled around us$ bn....