| 1. | Equal pressure welding torch and cutting torch
等压式焊炬割炬 |
| 2. | The kutta condition of equal pressure on upper and lower at the trailing edge of the propller and the duct is executed
通过迭代使桨叶随边和导管尾缘处上下表面压力相等，满足了库塔条件。 |
| 3. | The generalized inverse matrix method has been used to solve the nonlinear equal pressure kutta condition in the harmonic analysis method that is the first time inland
采用广义逆矩阵方法解决了谐调分析方法中的非线性等压库塔条件问题，这在国内尚属首次。 |
| 4. | The latter choice brings , if not eternal youth , then an equal pressure to avoid ageing , since neither daughter is more prone to death than the mother had been
后一种选择中的两个子细胞，如果不能永葆青春，那么也有同等机会避免衰老，因为这两个子细胞都不会比母细胞更容易衰老。 |
| 5. | For " upper - air " , weather maps are usually drawn for isobaric ( i . e . equal pressure ) surfaces following the practice of conventional upper - air observations and analysis . air density and atmospheric pressure generally decrease as altitude increases
至于高空方面，由于常规的高空观测与大气分析都是在标准等气压面上进行，所以高空天气图亦习惯在等压面上绘制。 |
| 6. | This paper describes the structure and kinematic parameters for the uniform lapping of the four shafts ball - lapping machine using analytical and graphical methods , and establishes full conditions of the uniform lapping on requring equal pressure and velocity of four lap tools
根据四轴球体研磨机的球体研磨原理，由实现球体均匀研磨所需的压力和速度条件，对该机的结构参数和运动参数进行了解析和图解分析，建立了实现球体均匀研磨的充分必要条件。 |
| 7. | This paper describes the structure and kinematic parameters for the uniform lapping of the four shafts ball - lapping machine using analytical and graphical methods , and establishes full conditions of the uniform lapping on requring equal pressure and velocity of four lap tools
摘要根据四轴球体研磨机的球体研磨原理，由实现球体均匀研磨所需的压力和速度条件，对该机的结构参数和运动参数进行了解析和图解分析，建立了实现球体均匀研磨的充分必要条件。 |
| 8. | The computer program has following advantage : the solution of main blade is by iterative scheme in time domain , the kutta condition is used by explicit equal pressure condition , the jacobian matrix which can reflect the influence on the difference between the upper and lower surface at trailing edge by dipole is calculated in each iterative procedure , in order to improve the convergence of iteration
本文编制的螺旋桨非定常性能预报程序是针对主叶在时域中迭代求解的， kutta条件采用的是显式的等压条件，求解中为了提高迭代的收敛性，在每次迭代中都重新计算反映偶极子强度对尾缘处上下表面压力差影响的jacobi矩阵。 |
| 9. | The surface panel method has been applied to predict the hydrodynamic performance of highly skewed propeller . the surface of propeller and its trailing vortex are discreted by a number of small hyperboloidal quadrilateral panels with constant source and doublet distribution . for highly skewed propeller , the conventional method generating grid oriented along constant radii will result in a high aspect ratio and a high skewness and a twist panel near the propeller tip on blade surface , which result easily in incorrect calculation results of velovity on blade surface , even in iteration divergence and calculation failure . a “ non - conventional grid ” is developed to acoid these problems . this grid can effectively solve the problem of the calculation and convergence for highly skewed propeller . the non - linear kutta condition of equal pressure on upper and lower at the trailing edge is executed by the iterative procedure . by sample calculating , the obtained results are satisfied the experimental data
采用面元法预报大侧斜螺旋桨水动力性能，螺旋桨表面及尾涡面离散为四边形双曲面元，每个面元上布置等强度源汇和偶极子分布.对于大侧斜螺旋桨而言，桨叶表面采用常规的等半径网格划分方法在近叶梢处将导致大展弦比、大侧斜和扭曲面元，这容易使桨叶表面速度的计算结果不正确，甚至会导致迭代过程发散及计算失败.文中建立了一种“非常规网格”划分方法，能有效地解决大侧斜螺旋桨的计算和收敛问题.桨叶随边处通过迭代实现非线性等压库塔条件 |
