试面
1.HF + HNO3 water solution can be used for corroding of metallographic sample of martensitic stainless steel, corroding efficacious is the same as its of 4% nitric acid alcohol solution, corroding speed is quick and corroding test surface is clear, similar discoloration made on test surface can be avoided when FeCl + HCl water solution is applied.
4.When you try a shoe on, be sure the upper is comfortable against the top of your foot and is not too tight.
5.The influences of interface additional resistance force and exponent of non-Newtonian power law fluid on bottomhole flowing pressure are also studied. (4) The mathematics model of well testing interpretation has been established and solved concerning three region homogeneous media radial composite reservoirs with Newtonian/non-Newtonian/ Newtonian fluids accounting for wellbore storage, skin effect in wellbore and additional resistance force in discontinuity location.
6.In order to investigate the mechanics properties of square CFT (Concrete-Filled Tubular) stub columns with binding bars under unilateral eccentric loads, 14 specimens were tested by considering the parameters such as the steel ratio, the load eccentricity ratio and the location of the binding bars.
7.The trial functions of Ritz procedure with parametric surface characteristics are constructed to get functional and governing equations.
8.In order to solve the problems of which the spiral bevel gear of Oerlikon type is necessary to out and modify repeatedly, a new method was developed to predict the contact pattern and greatly reduce the cost for manufacturing by means of building a tooth contact analysis model of prolate epicycloids bevel and hypoid gears for Oerlikon SKM2.
9.There are two different constitution forms for the square tubes with ribs in the test specimens, one consists of two welded channels with stiffening lips (channel tubes), stiffening lips (angle tubes).
10.This paper introduces the surface forming technology for pocket concrete overflow weir, analyzes and compares construction technique for two types of gate and built-in parts, and presents rating methods for concrete samples when they are less than 30 groups.
