前齿

Moreover, they are not suitable for gears manufactured by different cutting tools. Based on gear generation principle, a new method to establish accurate 3D solid model of cylindrical gear by mechanism function of Pro/E is proposed. Taking the manufacture of spur-gear with pre-grinding hob as an example, this method is introduced in details and the accurate 3D solid model is set up.

以范成法加工齿轮的原理为理论基础，介绍在Pro/E平台下利用其机构模块的"轨迹曲线"功能精确构建各种刀具加工出来的渐开线圆柱齿轮齿廓曲线的方法，并以磨前滚刀加工直齿圆柱齿轮为例，详细介绍该方法的使用步骤，构建其精确的三维实体模型。

Rinsing with Glister Concentrated Mouthwash has been shown to be more effective in removing plaque than just brushing alone.

A：牙垢膜是由牙齿表面细菌形成的黏膜，会制造酸性物质并侵蚀珐琅质丽齿健氟素牙膏能在牙石形成前清除牙垢膜；配合丽齿健浓缩漱口水使用，更证实比单刷牙更有效减少牙垢膜

However, logarithmic spiral can be used to substitute for the Archimedes curve to solve such problems and guarantee the stability of cutter machinability .

传统的阿基米德螺线齿背的铲齿成形铣刀在重磨前刀面后，切削刃上各点的后角将发生变化，从而影响刀具切削性能的稳定。

Methods 32 cases of type Ⅱ(20 cases) and shallow type Ⅲ(12 cases) odontoid fractures were treated by anterior odontoid screw fixation.

目的 探讨前路齿状突螺钉内固定技术治疗Ⅱ型和浅Ⅲ型齿状突骨折安全性和临床疗效。

Results According to articulation position, 68.44% of misarticulations of functional speech disordes occurred in dental consonants; while 57.78% in palatal consonants; 23.11% in alveolar consonants; 24% in velar consonants; 14.67% in lateral consonant and 17.33% in retroflex consonants. According to speech pathology, 37.33% of misarticulations was palatalized misarticulation; while 22.67% lateral misarticulation; 21.33% inter-dental misarticulation; 8% palatalized misarticulation with lateral misarticulation; 5.33% lateral misarticulation with interdental misarticulation; 1.33% nasopharyngeal misarticulation and 4% others.

结果 功能性异常语音的异常语音出现率按构音点分：舌尖前音(68.44%)、舌面音(57.78%)、舌尖后音(23.11%)、舌根音(24%)和舌尖中边音(14.67%)、舌尖中音(17.33%)，它们可单独出现，也可两种异常音并存；按语音病理学分类：腭化音占37.33%、侧化音占22.67%、齿间音占21.33%、腭化音+侧化音占8%、侧化音+齿间音占5.33%、鼻腔音占1.33%、其它占4%。

At the same time, the factory has a high quality the productionmanagement, the technical development talented person troop and a setof collections production, the management, the sale, the service is abody thing fluid department, And uses the first-class material quality, The Yaazip product best-selling nation and exports European andAmerican, Japanese, the South Korean area.

同时，公司拥有一支高素质的企业管理、技术开发人才队伍和一套集生产、经营、销售、服务为一体的物流体系，并采用一流的材质，专业生产3＃-10＃各种规格的尼龙、树脂、金属及隐形等高品质拉链拉头系列，同时新开发生产有：尼龙U型前码、尼龙互拼、树脂三角齿，方齿、铜方齿及Y齿拉链，公司产品畅销全国并出口欧美地区。

A case report was presented with a female patient of class II malocclusion, bimaxillary dentoalveolar protrusion with space deficiency. Bilateral lower left second molars were mesially inclined impactions with large caries. The lower left second molar was diagnosed with acute apical periodontitis.

本文提出一双颚齿槽前突合并齿列拥挤之安格氏二级咬合不正之女性患者，其下颚两侧第二大臼齿为近心倾倒之阻生齿合并龋齿，而左下第二大臼齿之龋齿已侵犯到牙髓而有急性根尖牙周炎的情况。

Orthographic representation of speech sounds –broad and narrow transcriptions 语音的书写形式-宽式和窄式音标 IPA-International Phonetic Alphabet 国际音标 There are two ways to transcribe speech sounds. One is the transcription with letter-symbols only, called broad transcription. The other is the transcription with letter-symbols together with the diacritics, called narrow transcription

窄式音标。实例：对 pit/spit 中 p 音的比较： pit 中的 p 是送气音，在窄式音标中标为上标，写作： spit 中的 p 是不送气音，在宽式音标中不作标示，写作：对 leaf/feel/build/health 中 l 音的比较： Leaf 中 l 在元音前，叫清晰音，在宽式音标中不作标示，写作： Feel 中 l 出现在单词结尾，叫模糊音，在窄式音标中加变音符号 Build 中 l 出现在另一个辅音前，也叫模糊音，在窄式音标中也加变音符号 Health 中 l 出现在齿音前，受其影响叫齿音，在窄式音标中加变音符号 5。

Gear shaper cutter with convex rake face with hard-tooth-face can improve the ability of anti-collapse efficiently while guarantee the shape precision compared with traditional gear shaper cutter.

硬齿面凸曲前刀面插齿刀和传统插齿刀相比能够在保证构形精度的前提下有效提高刀齿的抗崩刃能力。

A new-type bike features that its pedal crank has an arc rack bar acting on the ratchet gear in single direction and in turn driving the drive chain wheel, a reset unit composed of crank mechanism is used to make left and right pedal cranks be pedaled alternatively, and its front movable saddle plate is connected via connecting rod to pedal crank for making rider comfortable. Its advantages are high drive performance and efficiency and saving labour.

一种新式自行车，其最大特点是蹬踏杆上含有一弧形齿条，由该弧形齿条上的轮齿作用于具有单向离合的棘齿轮，从而带动主动链轮转动，由曲柄机构组成的复位器使左右蹬踏杆能够交替连续踩踏以驱动自行车行驶，前活动座板与蹬踏杆由连杆相连结，从而实现同步摆动给以乘骑者踩踏感到舒适，该发明具有传动性能好，效率高，力损耗小等优点。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。