central bore B-mode transducer 中心孔式B型换能器
A central rod of the shock absorber includes a central bore that is fluidly coupled with air pressure within air springs of the suspension assembly.
一个减震器中央棒包括一个中央孔是在空气流畅，空气压力耦合弹簧的悬挂系统的安装。
These provide access to the central bore of the well underneath most of the heavy valves which should have closed off the flow of oil, but for some reason did not.
这些为连接在许多沉重的真空阀下的钻井中心的钻孔提供了条件。这些真空阀本应该阻止石油的外泄，但出于某种原因没有做到这一点。
Some NDT methods for surface defects, mainly cracks, on the rotor central bore of steam turbine and generator are introduced, and the features are compared and analyzed.
介绍了目前常用的几种检验汽轮机、发电机转子中心孔内表面缺陷（主要是裂纹）的无损检测手段，并对各自的特点进行了分析比较。
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