Tungsten bars, rods, profiles and profiles plates, sheets, strip and foil of a deeper level of processing products export tariffs, so the 5% export tax rebate policy will continue. It can be understood, at least for now, for this type of tungsten production and exports, the country is still allowed, and even encouraged.
2013年7月23日星期二
Mo (Molybdenum) attribute
Density 10.2 g / cc. Melting point 2610 ℃. Boiling point 5560 ℃. Valence of +2, +4 and +6 +6 stable price. Molybdenum is a transition element Molybdenum crucible powder, easily changes its oxidation state, the oxidation-reduction reaction in the body plays a role in electron transfer. The oxidized form, the molybdenum is likely to be in the +6 state. Although the electron transfer during which it is also likely to be restored first +5 valence state, but after the restoration of the enzyme has been found in other molybdenum oxidation state. Molybdenum is a xanthine oxidase / dehydrogenase, aldehyde oxidase and sulfite oxidase components, thereby acknowledge their animals for the human body and essential trace elements.
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