查询词典 decayed tooth

These tooth-shaped chains are analyzed by using the techniques of tooth contact analysis with geometric constraints and force constraints incorporated.

本论文根据啮合曲面理论进行齿形链条的运动分析，主要是采用齿面接触分析方法（Tooth Contact Analysis， TCA）搭配几何拘束和力量平衡限制条件。

According to the principles of tooth meshing and manufacturing helicoi ds, a mathematics model is constructed to reflect the manufacture process of nut , and the formula of the grinding wheel section is developed. The parameters of the section are obtained through numeral arithmetic; moreover the parameters of the dresser are worked out. Based on these work, the solid model of the ball scr ew nut, grinding wheel and tooth dresser are developed in the Pro/E software, wh at's more, the process of the dressing...

根据螺旋面加工原理、齿形啮合原理及回转面砂轮加工螺母工艺建立了相应的数学模型，并推导出砂轮截形的计算公式；采用数值计算方法求解砂轮截形参数，进一步得到修整器靠模板的参数；在此基础上，利用Pro/E软件对大导程滚珠丝杠螺母、砂轮和砂轮修整器进行了实体建模，并对砂轮的修整过程和螺母的加工过程进行了运动仿真，有效地验证了砂轮截形的计算结果。

By the use of Circling cluster and Envlopment theory and flat surface sit-mark transformation theory, the chain wheel tooth equation of roller chain at high speed to match conjugage engagement is deduced.Establishing chain speed equation of roller chain at high speed,based on the analysis of the speed curves between roller chain at high speed and common roller chain,good drive of roller chain at high speed is verificated theoretically.By a example that move distance from transverse vibration between roller chain at high speed and common roller chain is contrasted,the accuracy of those theories that the paper brings up and higher functions of roller chain at high speed is proved.Finally, Establishing conjugage engagement line equation of roller chain at high speed and analyzing the complete engagement zone, the chain wheel tooth curve equation is studied at a higher degree. At the same time,the lack's place of the research result is pointed out.

依据高速滚子链设计要求与H_y-V_0齿形链的研究，阐述了滚子链传动实现准共轭啮合理论可能性；利用圆族包络法结合平面坐标变换理论推导出了满足共轭啮合的高速滚子链的链轮齿廓曲线；建立起高速滚子链链速方程，通过对高速滚子链与普通滚子链链速曲线的对比分析，从理论上验证了高速滚子链具有良好的传动性能；最后，建立起高速滚子链共轭啮合线方程，对其整个啮合区间进行了分析，进一步研究了链轮齿廓曲线方程，确定了主要参数的设计方法的问题，并同时指出了不足之处。

Tooth eruption ; Osteoprotegerin ; Tooth germ ; Dental sac

牙齿萌出；骨保护素OPG ；牙胚；牙囊

Tooth pulp is the tissue inside the roots of the teeth that contains all the nerves and blood vessels that nourish the tooth.

牙牙髓是组织内的根源牙齿包含所有的神经和血管滋养牙齿。

Aimed at the different tooth profile shape of five kinds of tooth profile plane models, the paper adopts a method of the control line to generate the finite element grid.

针对五类齿廓平面模型不同的齿廓形状，采用控制线法自动生成有限元网格。

I know tooth brush and tooth paste.

我知道牙刷和牙膏。

We want to buy Bio-Technology Products, Reagents and Supplies, Tooth Paste and Tooth Brush

我们要采购生化技术产品，试药和用品，牙膏和牙刷

We want to buy Cosmetic Accessories, Tooth Paste and Tooth Brush

我们要采购化妆品配件，牙刷

Tooth injury is common emergent disease in the stomatological department,the dependable fix technique is the key to treat tooth injury.

牙外伤是口腔科中常见的急诊病种，可靠的固定技术是治疗牙外伤的关键。

Molecular Distillation is a kind of high vacuum distillation method, which is suitable for the separation of high boiling, heat sensitivity and viscidity products.

分子蒸馏技术是一种在高真空条件下进行的连续蒸馏过程，适合于分离高沸点、热敏性及具有生物活性的混合物。

They are to the Noughties what yuppies were to the Eighties .

那在六十年代是时髦的，但在八十年代肯定是过时了