文章讨论修井机工作特点时指出，提高修井速度是修井机主要工况。
While the working properties of workover rig are discussed in this paper, it is pointed out that the high rate of workover operation comes more and most into prominence.
这些现象严重危害管道的工况，并且是影响阀道局部水头损失的主要因素。
These phenomenon jeopardize the condition of the project seriously, and it is the main factor that influences the loss of local water head.
主要用于一些高压差或流阻小的工况，也可作为釜底放料阀使用。
Mainly used for high pressure or flow resistance of the working conditions, but also can be used as the bottom discharge valve.
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