We also assemble a set of permeability testing equipment, by which we study on the effect of density, thickness and air pressure on the relative permeability.
并利用自行组装的测试设备研究了柔性石墨板密度、厚度以及空气压力差对相对透气系数的影响。
The common methods of drilling rods testing include magnetic particle inspection, permeability testing, radial testing and ultrasonic testing, but these methods all have considerable deficiencies.
检测钻具缺陷的常用方法有磁粉探伤、渗透检测、射线检测、超声波检测，都存在不足。
The common methods of drilling rods testing include magnetic particle inspection, permeability testing, radial testing and ultrasonic testing, but these methods all have considerable deficiencies.
检测钻具缺陷的常用方法有磁粉探伤、渗透检测、射线检测、超声波检测，都存在不足。
应用推荐