Ventilation of starting rotation device ventilation pipe is from Axial flow of swirl hole inner surface takes air leads to vacuum cavity, model existence of scale effect.
起旋室通气井通风系由旋流洞内表面轴向水流“挟带”空气而致空腔内气体压强减小进入，模型存在缩尺效应。
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。
The utility model discloses a novel vehicle-mounted head pipe, the sidewall of which is provided with at least one line guide hole for wiring harness to get through.
本实用新型公开了一种新型车用头管，头管侧壁至少设有一个供线束穿设的导线孔。
The utility model discloses a novel vehicle-mounted head pipe, the sidewall of which is provided with at least one line guide hole for wiring harness to get through.
本实用新型公开了一种新型车用头管，头管侧壁至少设有一个供线束穿设的导线孔。
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