查询词典 tooth

Firstly, the developing principles of the cylindrical internal helical gear are proposed through analyzing the movement and geometry requirements, which provides continuous contact between the mating gear surfaces. The tooth surface of the internal helical gear in the new gearing can be imagined as being generated by the normal section of the conjugated surface of the ball-tooth, moving along the radial projection of helix line of the tooth-root circle. Also, the proposed surface can be approximate tangent to the conjugated surface of the ball-tooth along a spacial curve.

首先，通过分析保证行星轮作螺环运动时与内斜齿轮实现连续啮合传动的运动和几何条件，提出了圆柱内斜齿轮齿面的两种形成原理：即由球齿运动包络曲面的法截面沿其齿根圆螺旋线在径向的投影进行拓展所形成的内齿面，以及与球齿运动包络曲面呈近似相切接触的等螺距齿面构成的内齿面。

The hairdressing dentistry one who establishes to exclusively bring trouble in the center carries on a super voice Jie tooth and spray powder Jie the item of the tooth, also the development has a plain Jie tooth private, their enthusiasm contributes efforts to you and dissipates sorrow for you and return you have a healthily pure tooth, let you smile to often open

美容牙科中心设有专门为患者进行超声洁牙和喷粉洁牙的项目，并有培养有素的洁牙士，她们热情为您服务，为您解忧，还您有一副健康洁白的牙齿，让您笑口常开

In the peacetime, the bactria results in of the chronic infection will make gum inflammation, easily bloodshed, palatine bone absorption, decayed tooth and toothache, end because dens turnover get sick of tooth loose move or dens neurapophysis necrosis and pull out a tooth, next door usefully the second molar teeth be usually also subjected to spread and result in at this time the injury of waiting the degree even pull out a tooth not, this is also the most regrettable place.

在平时，细菌造成的慢性感染会使牙龈发炎，容易流血，骨吸收，蛀牙及牙痛，最后因牙周病的牙齿松动或牙髓坏死而拔牙，这时隔壁有用的第二大臼齿往往也会受到波及而造成不等程度的伤害，甚至拔牙，这也是最可惜的地方。

The tooth stone calculus is a kind of foreign body body to mouth cavity, it will continuously stimulate a tooth to organize for week, and will oppress a gum, influence blood circulation, germ infection make the tooth organized for week, cause gum inflammation's atrophying, formation tooth week bag bag.

牙结石对口腔而言是一种异物体，它会不断刺激牙周组织，并会压迫牙龈，影响血液循环，造成牙周组织的病菌感染，引起牙龈发炎萎缩，形成牙周囊袋。

Tooth color or appearance are poor, four wreaths plain tooths, tooth defection and damage or external injury break of tooth, can also pass to roast a porcelain tooth to get a perfect repair.

牙齿颜色或形态不佳、四环素牙、牙齿缺损或外伤折断的牙齿，也可以通过烤瓷牙得到完美的修复。

The purpose pulled out a tooth for vacating space, give those because tooth hustle cause not tidy tooth rules, as for the blind side pulling out a tooth will gather together when the time comes, this hands over to a doctor, so don't the white purpose asks a doctor, whether want to inset false teeth the crevice pulling out, the words of false teeth directly don't sooner roast porcelain and also be subjected to this offense

拔牙的目的是为了空出空间，来给那些因牙齿拥挤导致不整齐的牙齿规位，至于拔牙的缝隙到时候会合拢，这个交给医生，所以不要白目的问医生，是不是要把拔掉的空隙镶上假牙，要假牙的话直接去烤瓷不更快，还受这个罪啊

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However, whether the degree of tooth wear has something to do with tooth microstructure, how specific occlusal factors affect the development of tooth wear, and what kind of relationship exists between tooth wear and bruxism or TMD, all these are not clear yet.

作为磨损发生的主体，牙齿的内部结构与磨损程度之间是否存在一定的关系，牙齿所构成的特定的个体咬合因素及其生物学力学特征会对磨损产生何种影响，口颌系统两大功能紊乱性疾病——磨牙症、TMD与磨损之间存在何种关系，均尚不清楚。

For cutting the composite lock gear with unequal tooth thickness, a study is made on the design method of gear sharper cutter with nonstandard parameter involute tooth profile and noninvolute tooth profile. The cutter tooth arrangement, the choice of teeth number of the cutter and the basic method of cutter design are discussed; and a new method of choosing deflection factor by using limited area is presented.

研究加工不等齿厚的非标准参数渐开线齿形，与非渐开线齿形复合的锁闭齿轮插齿刀刀齿的排列、刀具齿数的选择以及刀具设计的基本方法，介绍用限制区域选择插齿刀变位系数的新方法，并给出刀具齿顶后角与侧螺旋角的关系曲线，为插齿刀参数的选择提供依据。

Roast a porcelain tooth of probably age segment at 20-60 years old of, it needs to fix an original tooth to whet very thin 1 F before making, because the Heng tooth of teenager didn't develop completely, Sui chamber generous, easily wound and tooth Sui.

烤瓷牙的大概年龄段在20-60岁之间，它在制做前需将原有的牙修磨很薄一层，因青少年恒牙未发育完全，髓腔宽大，容易伤及牙髓。

The big eared hedgehog, the little owl, the sand gecko, the three-toed jerboa, and every show needs a villain - saw-scale - the viper!

大耳刺猬，小猫头鹰，沙壁虎，三趾跳鼠，每场戏都需要反派角色：蝰蛇。

Plasmodiophora brassicae ; resting spores ; density gradient centrifugation of sucrose ; ultrasonic disruption

根肿；休眠孢子；蔗糖密度梯度离心；超声波破碎