Self - locking anchor nuts , single lug with two holes . classification 900 mpa 235 degrees c and 425 degrees c . iso thread 等级为900 mpa 235和425双单耳双孔自锁防松螺母. iso螺纹
Self - locking anchor nuts , floating , single lug with two holes . classification 900 mpa 235 degrees c and 425 degrees c . iso thread 等级为900 mpa 235和425双孔单耳浮动式自锁防松螺母. iso螺纹
As the requirements of metro line ' s setting , there is inevitably closed double - tunnel in building metro engineering 在城市地铁工程的修建中，由于地铁线路布设的要求，在喇叭口区间段不可避免的存在着近接双孔隧道的施工问题。
A discussion has been done on the limit width of double holes , moment holes , circular ring and disc so that the coefficients of light sources are calculated 摘要分析了双孔（双缝） 、矩孔（线） 、圆环及圆盘光源的极限宽度，计算出这些光源的光源系数。
Abstract : the intensity distribution in young ' s double pinhole interfer ence expriment is numerically calculate , and compared with the result of the nea r - axis approximation 文摘:数值计算了杨氏双孔干涉的光强分布，与傍轴近似条件下的结果作了比较，并以图形的方式显示了干涉条纹的形状
Prototype observation and model experiment indicate that flows in two channels of the discharge passage of an axial - flow pump and a guide vane mixed - flow pump are unequal to each other , there is flow deviation 摘要原型观测和模型试验都表明，轴流泵和导叶式混流泵双孔出水流道两孔流量不等，存在偏流。
Based on the principles of the laser interference , the paper , has made derivation on the plane and dimensional images generated during the young ' s double - hole laser interference experiment and the 3d and 2d interference image equation are derived 摘要根据激光干涉产生的原理，对杨氏双孔激光干涉实验所产生的平面及空间图像进行了数学推导，得出了三维及二维干涉图像方程。
Medieal needle with two elastic eyes is made of high quatified stainless steel . the spear is sharp , even , tough and elastic . it is not necessary to thread a needle bceause the suture can be easily tumbled in the eyes 医用双孔弹机孔缝合针是用高级不锈钢丝材料制成，针尖锋利，刺穿顺畅，硬度、弹性、韧性、光洁度极佳，为方便医生使用，针孔不用穿线，只需把线嵌入即可使用，操作简易安全方便。
Abstract : a system by which the process of dynamic tension of yarn can be measured is studied . this system includes a force sensor with double holes beam structure and an electronic circuit for measuring . with the help of the system , the dynamic tension process of yarn can be measured and recorded during winding 文摘:研究了一种测量络纱动态张力变化过程的系统.系统中设计了一种双孔梁力传感器和简易的测量电路板.该系统能够对络纱动态张力进行定量测定并绘制张力变化曲线,对研究络纱张力变化规律,分析影响张力变化的因素以及控制络纱张力波动,实现恒张力络筒具有重要的意义
The author puts forward using double pore model and two permeability model and triple medium models to represent its infiltrating fluid model and studies partly the infiltrating fluid . ( 2 ) various kind of test well curve form characteristic crevices - cave model on reservoir was studied . the test well curve of carbonate seam cave oil reservoir divides to 7 styles : homogeneity , double - pore , vertical - transmitting , compound , low - seepage , double - seepage and triple medium 充分利用动态资料和静态资料，结合塔河油田碳酸盐岩储层特征，开展典型探井的试井分析研究，将碳酸盐岩缝洞型油藏试井曲线划分为7大类：均质储层油藏、双孔介质油藏(包括孔隙?裂缝介质油藏、裂缝?孔隙介质油藏) 、垂直导流型油藏、复合油藏、低渗型油藏、双渗介质油藏和三重介质油藏。
