浮动海洋钻井作业时位于水面的伸缩节，它允许钻井船升降(垂直运动)而保持导管接触海底。
A telescoping joint at the surface in floating offshore operations that permits vessel heave (vertical motion) while maintaining a riser pipe to the seafloor.
给出一种新型的工业用内窥镜摄影系统，该系统由内窥镜、光学关节（四节刚性转像透镜导管）、摄影联接管和摄影机四部分组成。
This system consists of fourmain parts, namely, the endoscope, the optical links including four rigid guide tubes for theimage transfer lens, the photographic adapter and the camera.
数字减影血管造影前采用多层ct血管造影检查可以帮助在特定脊柱节段行选择性导管血管造影。
The use of MDCTA preceding DSA can be helpful to focus the selective catheter angiography on certain spinal levels.
数字减影血管造影前采用多层ct血管造影检查可以帮助在特定脊柱节段行选择性导管血管造影。
The use of MDCTA preceding DSA can be helpful to focus the selective catheter angiography on certain spinal levels.
应用推荐