The hinge is apt to be pull apart and the strength of the hinge connection is insufficient owing to the action of the elevatingforce in the course of casing lifting.
在套管的提升过程中，由于提升力的作用，铰链接头的失效形式一般表现为铰链拉脱或强度不足。
2
The up jarring section takes use of hydraulic mechanism, the jarring force can be adjusted according to up elevating load but can not exceed the max. load for tool load rated.
上击器采用液压原理，其震击力可由上提力的大小自由调节，但使用时不允许超过工具限定的最大负荷。
3
As a value principle, virtue is the final and the motive force of elevating the principle and value of life.