封闭

Methods: Thirty extracted human molars whose pits and fissures on the occlussal surface had been inoculated with Escherichia coli were randomly divided into three groups: group A was treated with newly confected phenol-formaldehyde resin which resinified the dental fissure contents, group B was sealed Bis-GMA resin in pits and fissures and group C as the control group was only treated by cleaning.

选择30颗人离体磨牙，在咬合面点隙裂沟接种大肠杆菌，随机分为3组；A组以新配制的酚醛树脂使点隙裂沟内容物树脂化，B组以成品Bis-GMA封闭剂作点隙裂沟封闭，C组仅进行表面清洗作为对照组；各组分别沿裂沟点隙处片切牙齿，放入LB培养基培养，观察大肠肝菌生长情况。

In the applying, protein-free blocking agent Tween 20 to BRAB-PBPIFA,possessed better blocking effect.

无蛋白封闭试剂 Tween 20在 BRAB-PBPIFA中具有较好的封闭效果。

XGN49-40.5[DXG-40.5] indoors gas insulation metal seal switching gear (hereafter refers to as "sufficient wind chest") is our company introduces the Chinese Electric power Federation Dragon Source Electric power Research institute technology development, the development, the production high tech product, its technical performance satisfies GB/T11022 "High-voltage switch Equipment And Control device Common Specification" and GB3906 "3~35kV Exchange Metal Seal Switching gear" the standard, has high reliable, exempts the maintenance, the occupying a land area of few characteristics; The main technical parameter has achieved the international advanced level.

XGN49-40.5[DXG-40.5]户内气体绝缘金属封闭开关设备是我公司引进中国电力联合会龙源电力研究所技术研制、开发、生产的高科技产品，其技术性能满足GB/T11022《高压开关设备和控制设备的共同技术要求》和GB3906《3～35kV交流金属封闭开关设备》标准，具有高可靠、免维护、占地少的特点；主要技术参数已达到国际先进水平。

Designing space mechanism run into question at first is that correct to confirm space degree of freedom of organization, but calculating many degrees of freedom, seal more ring, harmony wave gear wheel organization, space degree of freedom of organization of mixing with traditional degree of freedom must be very tedious; Calculating general form seal ring low packs of space degree of freedom of organization can be limited greatly too.

设计空间机构时，首先遇到的问题是要正确确定空间机构的自由度，然而，用传统空间机构自由度公式去计算多自由度、多封闭环、谐波齿轮机构、混合型空间机构的自由度时，必须进行变换；计算一般单封闭环低副空间机构自由度时，也会受到很大限制。

Spring safety valve spring force and rely mainly on the work of another spring-loaded safety valve in the closed and not closed, generally flammable, explosive or toxic media should use closed, steam or inert gas used is not closed type, in the spring-loaded safety valve in there with a wrench and without wrenches.

弹簧式安全阀主要依靠弹簧的作用力而工作，弹簧式安全阀中又有封闭和不封闭的，一般易燃、易爆或有毒的介质应选用封闭式，蒸汽或惰性气体等可以选用不封闭式，在弹簧式安全阀中还有带扳手和不带扳手的。

Mainly depend on spring-loaded safety valve spring and the work force, and spring-loaded safety valve in the closed and non-closed general flammable, explosive or toxic media should be chosen behind closed doors, steam or inert gas can be chosen, such as closed type, in the spring-loaded safety valve with wrench in there and without wrench.

弹簧式安全阀主要依靠弹簧的作用力而工作，弹簧式安全阀中又有封闭和不封闭的，一般易燃、易爆或有毒的介质应选用封闭式，蒸汽或惰性气体等可以选用不封闭式，在弹簧式安全阀中还有带扳手和不带扳手的。

Spring-loaded safety valve spring force which mainly rely on the work of another spring-loaded safety valve in the closed and non-closed, generally flammable, explosive or toxic media should be used enclosed, steam or inert gas, etc., may selection is not closed, in the spring-loaded safety valve with a wrench in there and without wrench.

弹簧式安全阀主要依靠弹簧的作用力而工作，弹簧式安全阀中又有封闭和不封闭的，一般易燃、易爆或有毒的介质应选用封闭式，蒸汽或惰性气体等可以选用不封闭式，在弹簧式安全阀中还有带扳手和不带扳手的。

China has achieved three historic transitions: from a highly centralized planned economy to a dynamic socialist market economy, from a closed or semi-closed society to a fully open one, and from a state of mutual estrangement with the rest of the world to one of close interactions.

中国实现了从高度集中的计划经济体制向充满活力的社会主义市场经济体制的历史性转变，实现了从封闭半封闭到全方位开放的历史性转变，实现了同世界从相互隔绝到利益密切相联的历史性转变。

The model of the ductile iron solidification is set up according to the solidification property and influence factor.

针对球墨铸铁的凝固特点和影响球铁件收缩缺陷的因素，提出了封闭孤立收缩膨胀叠加法预测球铁缺陷，在CASTsoft凝固模拟软件基础上，分别用铸钢模块和采用封闭孤立收缩膨胀叠加法的球铁模块预测典型铸件缺陷。

Objective:Discusses the person to welcome the hole seal to treat the adult acute epiglottis inflammation clinical curative effect.

目的：探讨人迎穴封闭治疗成人急性会厌炎临床疗效。方法：确诊急性会厌炎成年患者76例，随机分为常规治疗组和人迎穴封闭治疗组各38例，常规治疗组用生理盐水250ml+先锋Ⅵ2.0+地塞米松5mg静脉滴注，每日2次；人迎穴治疗组用硫酸庆大霉素4万u+地塞米松5。。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。