查询词典 hydrogen fluoride

Due to large amount impurity in ammonium fluoaluminate which is used as raw material for the production of fluoride salt ,the smooth operation and the quality of cryolite are affected.

用氟化盐生产的原料氟铝酸铵中机械杂质多，影响了车间正常生产和冰晶石产品质量的现状，提出使用弧形筛过滤料浆，除去其中的机械杂质，来解决上述问题的方案，经生产试用，效果良好，取得了很好的经济效益。

This film is deposited on the surface of the glass by evaporating crystals, use of cryolite or magnesium fluoride, in a vacuum

涂敷薄膜时，通常是将玻璃置于真空之中，然后使冰晶石或氟化镁晶体气化，令其沉积于玻璃表面上。

To explore the effect of high fluoride and low protein on tooth development and clarify the mechanism of excessive tooth wear, and decalcification of incisors were researched by SEM.

为了探索高氟低蛋白对牙齿发育的影响，阐明牙齿过度磨损的机理，应用扫描电镜对第一、二切齿脱钙前的矿化及脱钙后的基质结构作了观察。

Objective To evaluate the most effective method of fluoride application to prevent decalcification of enamel before,during and after etching in orthodontic treatment.

目的探讨氟化物在正畸治疗中预防牙釉质脱矿的最佳使用方法。方法制备正畸拔除的前磨牙96颗，随机分成4组，分别为对照组及酸蚀前、中、后用氟组，粘结托槽后，将每个样本分别放入装有2ml酸性人工唾液的试管。

Objective To find a simple and effective way to prevent enamel decalcification by guiding patients wearing fixed appliance to use fluoride mouth rinse.

目的 通过指导接受固定矫治器治疗的患者使用含氟漱口液，以期找到一种简便有效的方法来防治牙釉质脱矿，从而应用氟化物防治固定正畸治疗中的牙釉质脱矿。

Objective: To find a simple and effective way to prevent enamel decalcification by guiding patients treated with fixed appliance to fluor protector NaF and brush teeth with fluoride toothpaste.

目的：了解用固定矫器治疗后的牙釉质脱矿的发生率及严重程度，并评价用75%NaF处理牙面和使用含氟牙膏后的结果。

Fluoride mouth rinse can effectively prevent and treat enamel decalcification in fixed-orthodontic treatment.

在固定正畸治疗中，含氟漱口液能有效防治牙釉质脱矿。

Methods 40 selected patients treated with fixed appliance were randomly divided into two groups （n=20 each）, the fluoride mouth rinse test group and the placebo control group.The number of decalcified teeth and the severity of enamel decalcification were evaluated and compared after three months and after six months.

从正在接受固定正畸治疗的恒牙列患者中随机选择40例上前牙明确诊断为釉质脱矿的患者，随机分配到试验组和对照组，每组各20例，分别比较3个月后及6个月后牙釉质脱矿程度的变化。

Fluoride toothpaste can effectively prevent enamel decalcification in fixed-orthodontic treatment.

在正畸治疗中配合使用氟化物处理牙面，可预防牙釉质脱矿的发生。

At present, toothpaste with fluoride is used to prevent the decayed tooth.

目前人们广泛使用含氟牙膏来预防龋齿。

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。