Other designs have a circular cutout in the middle that corresponds to the diameter of the pipe in the hole to seal the well when pipe is in the hole.
其它类型的设计则在中间有一个圆形的剪切块，使其适合井眼内管柱的直径以便当管柱位于井眼内时能够密封井眼。
Large-diameter hydraulic cylinders, normally retracted, force the two halves of the cover together in the middle to seal the wellbore.
大直径的液压缸，通常是收缩，迫使闸板的两半一起向中间运动去密封井眼。
Have resolved the leakage problem through improving quality of seal face, adding diameter of O-ring and other measures.
通过提高密封表面的质量、增加O型圈的直径等措施，解决了渗漏问题。
Result shows that the bigger dimension of inner diameter is, and the smaller elastic modulus of rubber is, the longer the life of hollow rubber seal.
结果表明，密封圈的空心直径越大，制成密封圈橡胶材料的弹性模量越小，密封圈的寿命越长。
The outer-body diameter of the plunger is cut just under production tubing drift to provide the maximum seal while the plunger moves fr eely.
当柱塞自由移动时，柱塞的外体直径刚好能够满足生产油管内径密封需求，提供最大的密封保障。
The main feature of this kind valve is entire rubber seal of diameter with anti-wear properties and all-pass runoff common gender .
此阀门主要特点是通径全橡胶密封阀座，具有很强抗磨损特性和全通径流通性。
By changing the brush diameter, density, the gap between brush bristles and the axis, and the shape of brush edge, the influence of the structure parameters on the seal performance is obtained.
通过改变刷毛直径、刷毛密度、刷毛与轴的间隙以及刷毛齿形，分析了这些结构参数对密封性能的影响规律。
Large diameter steel tanks, all of the overall quality of Beating structure, seal structure without using the world's most advanced combination of the 7-leak sealing technology.
大缸径油缸全部采用优质钢整体锻打结构，密封结构采用当前世界上最先进的无泄漏七层组合密封技术。
Copper wire, 0.020-inch diameter, is used when a wire seal is necessary. Wire sealing is a practice for the security of selected switches, levers, switch guards, etc.
02英寸直径的铜质保险丝仅用于固定电门、电门保护罩、推/拉杆等，以防止非故意操作。
The interface of the foot portion with the seal ring defines an interference diameter.
足部与密封环的交界面限定干涉直径。
When the disc is in the open position, the seal major axis is greater then the disc diameter and they do not touch.
阀盘处于打开位置时，密封件长轴大于阀盘直径，且相互不接触。
When the disc is in the open position, the seal major axis is greater then the disc diameter and they do not touch.
阀盘处于打开位置时，密封件长轴大于阀盘直径，且相互不接触。
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