氟化

This paper relates to the preparation of phosphorus pentafluoride and the solubility of phosphorus pentafluoride in aether.

本论文对以五氧化二磷和无水氟化氢为原料制备五氟化磷的工艺和五氟化磷在乙醚中的溶解度进行了初步研究。

Change saline industry at western country fluorine relatively for, our country fluorine changes technology of saline industry existence dimensions of difference of quality of backward, product, enterprise difference of small, benefit, pollution serious, management does not have the blemish such as foreword.

相对于西方国家氟化盐工业来说，我国氟化盐工业存在技术落后、产品质量差、企业规模小、效益差、污染严重、治理无序等缺陷。

The development history of calcium fluoride (CaF2) crystals is introduced; its basic perforanmances and properties are summarized.

简述了氟化钙(CaF2)晶体的发展历史，总结其光学特性，介绍了氟化钙晶体的生长新工艺技术和发展。

Fluorine turns a kind of salt is refine aluminium important and auxiliary material, main product melts aluminium for cryolite and fluorine.

氟化盐是炼铝的一种重要辅助材料，主要产品为冰晶石和氟化铝。

In the complex system of MeSO4, the removal of Ca2+ and Mg2+ by fluorination precipitation and double salt precipitation deep purification process was studied by single factor method.

分别以浸出液和氟化沉淀液为原料，采用单因素法对复杂MeSO4体系氟化沉淀除钙镁和复盐沉淀深度净化进行了研究。

Preparation method of perfluorooctane based on n-octane and anhydrous hydrogen fluoride as starting materials via electrochemical fluorination is described in detail finally.

介绍了全氟辛烷的性质和用途，列举了合成全氟辛烷的各种工艺路线，最后较为详细地论述了以正辛烷和无水氟化氢为原料，通过电化学氟化法制备全氟辛烷的工艺过程。

After remineralization, the surface structure of samples in Chinese nutgall group and Ag（ NH3 ）2F group became compacter and steadier, with presentation of small blotch and trabs; in NaF group, there was still laeune with trablike structure on the surface of the samples; in deionized group, the surface of samples was honeycomb appearance.

再矿化后，五倍子液和氟化氨银液组表面结构更加致密，均匀，呈小斑块，条索状；氟化钠液组表面也出现条索状结构，但仍有孔隙或腔隙存在；去离子水组表面出现蜂窝状结构。

RESULTS: Before remineralization, through SEM, short blunt eeptoma was found on the surface of lesions of samples in Chinese nutgall group and Ag（ NH3 ）2F group; while in NaF group, globular ecptoma was seen scattering on the surface of the lesions, together with laeune; in deionized group, there was Sharpey＇s fiber.

结果：再矿化前，扫描电镜观察五倍子与氟化氨银处理后牙骨质龋表面形成不规则短钝状突起；氟化钠液组形成大小不一的散在大球状突起，可见一些腔隙存在；去离子水组大量分布夏伯氏纤维。

Results Fluoridated milk had significant effects of remineralization,anti-deminer alization and anti-caries.

结果 氟化牛奶有明显的再矿化、抗酸脱矿及抗龋作用，而氟水有一定的抗酸脱矿及抗龋作用，无再矿化作用。

Also produce 1000 tons inorgnic fluorides series products per year, They are of good quality and mainly sold abroad.

现有年产3000吨三氟甲苯、8000吨对氯三氟甲苯、5000吨4-氯-3，5-二硝基三氟甲苯和年产1000吨无机氟化盐规模的生产能力，产品生产稳定，质量上乘，并远销国内外。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐