The paper tells about Latest scientific research abroad on medical microscope, laparoscope, Joint-scope, narcotic machine, breathing machine and pumping machine, etc.
本文介绍了国外医用手术显微镜、腹腔镜、关节镜、麻醉机、呼吸机、抽吸器等设备的最新科研情况。
2
As its structure character of beam pumping unit, vibration and noise happen on the joint of connection rod head and beam during operation.
游梁平衡抽油机由于其自身结构特点，在运行过程中，连杆上接头与横梁连接部分经常会出现振动和响声。
3
A pumping rod housing lock joint of a screw pump is primarily used to resolve the problem that the current screw pumping rod joint is easy to release.