查询词典 fluorine

Objective:To establish and prove the method to determine the fluorine in water sample by using the two-point locating .

本文通过对标准方法的再研究，结合监测仪器的特有性能，提出用两点定位法测定水质样品中的氟，通过对实验样品的精密度、准确度分析，本方法的标准偏差在0。

Melting point 3410 ℃, boiling point 560 ℃, relative density of 1935, F the external electronic structure of 5d46s2, in the chemical reaction time is very easy to lose 1-6 electronic, but also can get 1-2 electronic, so oxidation number of 0,± 1,± 2, 3, 4 , 5 and 6, with 6 price of the most stable compounds, such as WO3 does not dissolve in water, the air will form in the tungsten trioxide thin protective layer of tungsten, tungsten with fluorine at room temperature, chemical combination, red hot when there is no moisture and Bromine iodide together, red hot when you can and water reaction WO3, at room temperature reaction of tungsten with aqua regia, but the hot concentrated hydrochloric acid and sulfuric acid can only be played with its weak response, but molten nitrate, nitrite, too Hydrogen peroxide, sulfur steam, steam and other phosphorus can play intense reaction, high temperature can not be carbon, boron and silicon reaction of binary compounds, widely used in industrial tungsten steel and tungsten carbide, pure tungsten filament is used to the system, and X-ray tube Tube heating components, semiconductor components can be prepared tungsten silicide, tungsten industrial production is white or black tungsten ore tungsten ore refining.

熔点3410℃，沸点560℃，相对密度1935，F外围电子结构为5d46s2，在化学反应时很容易丢掉1—6个电子，也能得到1—2个电子，所以氧化数为0、±1、±2、＋3、＋4、＋5和＋6，以＋6价化合物最稳定，如WO3不溶于水，空气中的钨会形成薄层三氧化钨保护层，钨能与氟在室温下化合，红热并无潮气时能与溴、碘化合，红热时还能和水反应生成WO3，室温下钨可与王水反应，但热的浓盐酸和硫酸只能与其起微弱反应，但对熔融的硝酸盐、亚硝酸盐、过氧化氢、硫蒸汽、磷蒸汽等能起激烈反应，高温下不能与碳、硼和硅反应生成二元化合物，工业上广泛使用钨钢和碳化钨，纯钨用来制灯丝、电子管和X射线管的发热元件，硅化钨可制半导体元件，钨工业生产是将白钨矿石或黑钨矿石精炼。

All kinds of fluorine plastics tube, rod, sheet and film products.

l 各类氟塑料管、棒、板、膜等标准件。

Enterprise specializing in pumps, valves, pipes, pipe fittings, corrosion-resistant equipment, mechanical equipment, steel-lined plastic·úmaterials and various types of product development, design, production and sales of main products have fluoroplastics pump, steel-lined PTFE pump , liquid pumps, self-priming pump, magnetic pump, centrifugal pump, stainless steel pump, fluorine plastic lined plug valves, butterfly valve, ball valve, valve, check valve, valve, gate valve, pipe fittings and steel equipment ten Level of stress, some more than 1120 kinds of model specifications.

企业专门从事水泵、阀门、管道、管件、防腐设备、机械设备、钢衬氟塑料及全塑各类产品的研发、设计、生产和销售，主要产品有氟塑料泵、钢衬四氟泵、液下泵、自吸泵、磁力泵、离心泵、不锈钢泵，氟塑料衬里旋塞阀、蝶阀、球阀、截止阀、止回阀、隔膜阀、闸阀、管道件及钢塑设备十个压力等级，约1120多种型号、规格。

The product was a good fluorine surface active agent, and the surface tension of water solution with 0.1% mass fraction was 16.4 mN/m.

该产品是一种性能优异的氟表面活性剂，质量分数0.1%的水溶液表面张力为16.4mN/m。

Top Glory Farm Machinery Parts Factory We are the powder metallurgy market analysts pointed out: as a result of improved slagging agents and ladle refining furnace mode, all steel can not refine the use of fluorite, the results achieved in the secondary refining slag fluoride fluorine content and dissolution of the refining technology zero.

我们鹏利农机配件厂的粉末冶金市场分析师指出：由于改进了造渣剂和钢包炉的精炼方式，因此所有钢种都能不使用萤石进行精炼，结果实现了二次精炼渣中的氟含量和氟溶出量为零的精炼技术。

Study on Nitrogen Forms in Chaohu Lake and Wabu Lake Sediments;2. Fluorine, one of the necessary trace elements of human beings is presented in the form s of inorganic and organic compounds in foods, such as sodium fluoride, silicon fluoride, and fluoroacetate etc.

文中阐述了食品中氟的赋存形态及其分析方法，研究了灰化、碱熔、微量扩散、氧瓶燃烧、酸浸提及高温燃烧水解等前处理方法提取氟的形态差异，并对食品中氟的分析提出了建议。

TOP FLUOROCHEM CO.,LTD provides world class products based on tetrafluoroethylene and has staff of internationally known experts in chemical engineering, fluorine chemistry and textile chemistry. Our products are manufactured with the permission and supervision of three U.S.corporations: DFL,FluoroScience, and Innovative Consumer Polymers.

太普氟化工贸易有限公司拥有在国际化工、氟化学和纺织化学领域的知名专家，提供以四氟乙烯单体为基础原料的高质量氟产品，公司产品是在DFL， Fluoro Science，和 Innovation Consumer Polymers三家美国公司的许可和监督下生产制造。

In order to solve these problems, we have designed and prepared fluorine-containing polymer electrolytes and hybrid polymer electrolytes.

凝胶聚合物电解质要解决的核心问题是协调离子电导率和机械性能之间的关系。

Although the company set up not long, but in the history of organic fluorine has been more than 20 years, particularly in the fluorocarbon surfactant production, application is successful.

公司虽然成立时间不长，但从事有机氟的研究历史已经有二十多年了，特别在氟碳表面活性剂生产、应用方面更是成绩斐然。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。