The slotted pipe with narrow slots can be mass worked economically and efficiently by means of open loop system and hand automatic model shifter.
采用开环系统和手动、自动模式切换装置，可以经济、有效、大量地加工带有窄缝的割缝筛管。
The complex slotted cartridge is put forward on the basis of previous research, namely, a slotted pipe is added between slotted charge and borehole, using water as medium.
在前人的基础上提出了复合型切缝药包，即是在切缝药包和炮孔壁之间再加一个切缝管，用水做耦合介质。
The pressure of slotted pipes in a sandy well was analyzed. The bottom hole pressure was computed. A model for computing the bending strength and stiffness of a slotted pipe was proposed.
对割缝衬管在防砂井中受外挤力作用进行了分析，计算了井底压力（包括流体流经砾石层和割缝衬管的压降） ，建立了衬管割缝参数与割缝条幅弯曲强度及刚度之间的关系式。
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