Synthesis of ultra - fine crn powder with high purity by ammonolysis method 氨解法制备超细高纯氮化铬粉体的研究
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Hafnium metal powfer 金属铬粉
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Determination of nitrate nitrogen in fertilizer by reduction of sodium thiosulphate instead of chromium power 用硫代硫酸钠代替铬粉还原测定肥料中硝酸态氮
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Our product cr powder is optical vacuum coating material . we can produce according to the standard you demand . welcome to contact us and transact business with us 我公司生产的铬粉产品为真空镀膜材料，纯度高，品质优，可以根据您对产品规格的具体要求来生产！我公司坚持以“质量第一，信誉至上”为经营宗旨，热忱欢迎您与我们联系洽谈业务！
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Our product sio 、 cr powder is optical vacuum coating material . we can produce according to the standard you demand . welcome to contact us and transact business with us 我公司生产的一氧化硅、铬粉产品为真空镀膜材料，纯度高，品质优，可以根据您对产品规格的具体要求来生产！我公司坚持以“质量第一，信誉至上”为经营宗旨，热忱欢迎您与我们联系洽谈业务！
