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Pb |
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Pb, symbol for the element lead lead, metallic chemical element; symbol Pb [Lat. plumbum]; at. no. 82; at. wt. 207.2; m.p. 327.502°C;; b.p. about 1,740°C;; sp. gr. 11.35 at 20°C;; valence +2 or +4. ..... Click the link for more information. . PBSee PowerBuilder and petabyte. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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It reaches over land, sea and sky, in 5 continents and over 195 countries, carrying more then 300 petabits of traffic globally per month. High-end optical networking equipment such as backbone switches and Petabit routers require high currents and low voltages to power today's complex electronic circuitry. Nortel Networks is an industry leader in transport of SAN traffic across the metro, carrying more than 200 petabits of mission-critical traffic per day. |
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