Through the analysis of the stress characteristics of the circular pipe cavity mushroom floor, this paper analyzes the calculating model and method of the floor slab.
通过分析圆管式空心无梁楼盖的受力特点，分析了此楼板体系的计算模型及计算方法。
A novel water pipe, comprising a pipe wall and a tubular body with a pipe cavity, wherein the upper edge of the pipe wall (1) is axially provided with at least one groove (2).
一种新型水管，包括管壁和具有管内腔的管状体，其特征在于，所述的管壁(1)上沿轴向设有至少一条凹陷槽(2)。
If oil got into the production pipe from the bottom, then barriers that would have impeded its flow up the cavity around that pipe would have made little difference.
如果油流从油井底部进入到生产管线内，这个环绕在生产管线外部的阻隔体对阻止油流上升能起多大作用呢，两者的差异将会非常小。
Open packing seal cavity and cooling water pipe of other positions.
开启填料密封腔及其他部位的冷却水管。
The colonoscope rack setting auxiliary passage pipe is one double cavity passage pipe with elliptic cross section.
本发明是由一个双腔体的通道管组成，所述的双腔体通道管其截面呈非对称性椭圆形。
By changing design of the pressure stabilizing cavity and the intake pipe channel, freedom in shape design of the channels is improved, and the structure of the manifold is more compact.
通过改变稳压腔和进气管通道的设计，提高气道形状设计的自由度，使得歧管结构更加紧凑。
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。
When such a steel solidifies, a shrinkage cavity know as a "pipe" is formed in the top central part of the ingots.
当这种钢液凝固时，在钢锭头部中央会形成收缩孔。
Special design of basket die head of for HDPE(PP, ABS) large diameter pipe with thick wall offer lower melting temperature, good mixing, lower pressure of cavity , and stable production.
特殊设计的HDPE（PP，ABS）篮式膜具，使溶解温度更低，拥有好的混合效果，低的机头压力，并有好的稳定产量。
Special design of basket die head of for HDPE(PP, ABS) large diameter pipe with thick wall offer lower melting temperature, good mixing, lower pressure of cavity , and stable production.
特殊设计的HDPE（PP，ABS）篮式膜具，使溶解温度更低，拥有好的混合效果，低的机头压力，并有好的稳定产量。
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