氟

Fluorination technology was used by industries widely. The fluorinated HDPE fuel tanks for SORE have been approved by CARB.

氟化处理技术得到行业的普遍认可，经氟化处理的HDPE通机油箱已通过CARB的认证

The orthogonal design method is used for preparation of rare earth fluoride by rare earth oxide(Gd_2O_3) fluorination with NH_4HF_2 in this paper.

采用正交试验法，研究了用氟化氢铵作氟化剂直接与稀土氧化物(Gd2O3)反应，制备稀土氟化物的工艺，确定了氟化的最佳工艺条件，并进行了分析讨论。

The calixarenes used as PTC in the fluorination of tetrachlorophthahaloyl chloride to obtain dimethyl tetrafluoroterephthalate were studied in this paper.

研究了杯芳烃在四氯对苯二甲酰氯氟化制备四氟对苯二甲酸二甲酯反应中的相转移催化作用，发现以杯芳烃作相转移催化剂使产品收率得到了明显提高。

It was found when ionic liquid BF_4 was chosen for the solvent and CsF for the fluorination reagent, the overall yield 96.6% could be gotten after 3 hours.

通过研究我们发现在离子液体BF_4中，采用CsF做氟化剂反应3小时七氟醚的产率可以达到96.6％。

So it has made the great progress. The method studied in this research from o-Dichlorobenzene is a ideal route to synthesize 2,4- dichlorofluorobenzene, which has temperate condition easy to control,safe process,low cost and good quality of products; The method of Phase transfer catalysis fluorination without solvent is better than present technology in presence of DMSO as solvent in many aspects; In a word,it is worth being promoted by the domestic correlative factories.

本课题所研究的以邻二氯苯为原料的2，4-二氯氟苯合成路线反应条件温和，工艺容易控制，生产安全，而且产品质量好，是比较理想的合成路线；以季胺盐为催化剂的无溶剂相转移催化氟化法与溶剂法相比具有明显的优势；通过实验确定的工艺条件对工业化生产有重要的指导意义，可提高以邻二氯苯为原料的工艺路线的市场竞争力。

Drinking water was the main source of fluorine intake for Chinese residents.

饮用水氟含量是我国城市居民氟总摄入量的主要控制因素。

The fluorine is one of necessary nutritional trace element for human health.

氟是人体必需的微量元素之一，饮用水适宜的氟浓度为0.5～1mg／L。

After years of efforts, our products have proceeded from a sole category to diversified, packaging and serial categories, such as Heptafluoropropane (HFC-227ea) Fire Extinguishing System, High Press Carbon Dioxide Fire Extinguishing System ,Fluoroform (HFC-23) Fire Extinguishing System, Integrate Gas IG-541 Fire Extinguishing System, Foam Extinguishing System , Fire extinguisher , Water fire-fighting system, Special grade inorganic fire resistant roller shutters, Composite steel fire resistant roller shutters, Fire damper, Smoke fire damper, Low-noise cabinet centrifugal fire blower, Axial flow fire smoke exhaust blower, etc. All technical specifications fully satisfied the level of national standard.

经过多年的努力，公司的产品经历了由单一品种到多元化、配套化、系列化的发展过程，现有七氟丙烷（HFC-227ea）自动灭火系统、高压二氧化碳自动灭火系统、三氟甲烷(HFC-23)自动灭火系统、混合气体IG-541自动灭火系统、泡沫灭火系统、灭火器、水消防系统、特级无机复合防火卷帘、复合型钢质防火卷帘、防火阀、排烟防火阀、低噪声柜式离心消防风机、轴流式消防排烟风机等产品，所有产品各项技术指标完全达到国家标准。

Abstract］ Objective To research the method of classification which is suitable for situation of Chinese endemic fluorosis areas.

摘要］ 目的研究适合我国地方性氟中毒病区的氟斑牙分类方法。

Animal fluorosis caused by industrial fluoride pollution exists in many countries all over the world.

工业氟污染引起的动物氟中毒在世界范围内广泛存在。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。