Due to the special structure of controlled direction well, it can lead to severe abrasion even jamming if not adopting any measure when using progressing cavity pump rod to pump oil.
由于定向井井身结构特殊，利用螺杆泵进行抽油时如不采取任何措施势必造成杆柱严重磨损甚至卡死。
The utility model can not only lead a setline lover to use a very long fishing rod to fish, but also can cut off or set off as well as throw a fish hook conveniently.
本实用新型不但能使钓鱼线爱好者使用很长的钓鱼杆钓鱼，而且还可方便地收放钓鱼线和抛鱼钩。
The flapping mechanism adopts a parallel quadrilateral connecting rod mechanism to lead the tail fin of the robotic fish arranged on a tail fin frame to make periodic translational motion.
该拍动机构采用平行四边形连杆机构使安装在尾鳍架上的机构鱼的尾鳍作周期 性的平移运动。
The end face at one end of the inner lead-out rod and the outer lead-out rod is provided with small holes that are riveted with the lead-out wires at two ends of the thermal fuse.
内引出棒和外引出棒一端的端面上开有小孔，分别与热熔断器两端的引出线铆接。
The end face at one end of the inner lead-out rod and the outer lead-out rod is provided with small holes that are riveted with the lead-out wires at two ends of the thermal fuse.
内引出棒和外引出棒一端的端面上开有小孔，分别与热熔断器两端的引出线铆接。
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