管下的

In the paper, theoretic transfer heat model of HHCHP is established. After comparing experimental value and estimative value, we deduce that theoretic transfer heat model accords with actual condition, so we can estimate the heat performance of HHCHP by theoretic calculation formula.

同时建立了蜂窝热管平板式太阳能热水器的理论传热模型，通过对实验值和理论值的比较，得出进行简化后的理论模型在一般情况下与实际的情况是符合的，因此可以用理论计算公式对蜂窝热管平板式太阳能热水器的热性能进行估算。

The numerical simulation revealed the motion of phase interface into the phase change material under the first boundary condition.

为了开发高效的热能存储设备，本文提出了采用针翅管以强化相变蓄热设备传热的新结构，采用数值方法模拟了相变材料在该结构中融化的瞬态三维传热问题，得到了在第一类边界条件下相变材料融化过程的界面移动规律；并与光管相比，以说明针翅的强化传热作用。

The numerical simulation revealed the motion regularity of phase interface into the phase change material under the first boundary condition.

摘 要：为了开发高效的热能存储设备，提出了采用针翅管强化相变蓄热设备传热的新结构，采用数值方法模拟了相变材料在该结构中融化的瞬态三维传热问题，得到了在第一类边界条件下相变材料融化过程的界面移动规律；并与光管相比，说明针翅的强化传热作用。

It is found that the effective separation of the materials with medium or bad floatability by multi-circulation highly turbulent current mineralization is the key for raising the separation efficiency of floatation column by the test device of pipe floatation part.

管浮选的结构与实施都很简单，但在接近50%的高含气量条件下，管内流型至关重要；管浮选装置的两种布置方式的直接对比找到了解决该问题的答案。

Under the scanning electron microscope , for the first time we compare and study both the coalified tracheids through chemical maceration and permineralized tracheid lumen casts. This method reveals the microstructures of wall and perforations of G-type tracheids: 1 The lignified layer of secondary wall is composed of uneven material and further divided into S〓, S〓, S〓 layers; with the smooth enclosing wall, the perforation is internally dumbbell-shaped; 2 In Huia gracilis, the enclosing wall of tracheidal perforation contracts and possesses secondary perforations. The perforation has thickened border facing the tracheid lumen.

本文首次在扫描电子显微镜下对比研究经化学浸解获得的碳质管胞和矿化的管胞腔铸体，明确揭示出了G-型管胞壁层和穿孔的显微结构：1）Hsüa reflexa次生壁木质化层的组成不均一，分为S〓、S〓和S〓层；穿孔腔为哑铃形，腔壁光滑；2）Huia gracilis的穿孔腔收缩，腔壁上发育次级穿孔，孔口具有边缘加厚。

Results The extracted tubulin could assemble microtubules and form complex with tau in vitro.

结果电子显微镜负染显示纯化的微管蛋白在一定的实验条件下可聚集形成直径为25 nm的微管结构。

In operation, the downhole devices will be laid down with tubings which will move up and down using the operation machine. Since the injection head can rotate in the determined speed, the rotating flow, compared with the conventional stable axial flow, can prevent the sands from depositing in the horizontal annular and washing the screen. The jet from high-efficiency jet nozzle will wash the screen directly with concentrated hydro-power. The working fluid can be clean water, without damage to the formation.

作业时用油管下入该井下装置，利用作业机带动油管上下移动，由于喷头可按照既定速度旋转，返回流体在水平段由常规的平稳轴向流动变为旋转流动，既可实现对防砂管的全方位解堵，又能避免砂粒沉积；高效喷嘴产生的射流直接对着防砂管冲击，能量集中；工作介质为清水，不会对地层带来二次污染。

In operation, the downhole devices will be laid down with tubings which will move up and down using the operation machine. Since the injection head can rotate in the determined speed, the rotating flow, compared with the conventional stable axial flow, can prevent the sands from depositing in the horizontal annular and washing the screen. The jet form high-efficiency jet nozzle will wash the screen directly with concentrated hydro-power. The working fluid can be clean water, without damage to the formation.

作业时用油管下入该井下装置，利用作业机带动油管上下移动，由于喷头可按照既定速度旋转，返回流体在水平段由常规的平稳轴向流动变为旋转流动，既可实现对防砂管的全方位解堵，又能避免砂粒沉积；高效喷嘴产生的射流直接对着防砂管冲击，能量集中；工作介质为清水，不会对地层带来二次污染。

The experimental tubings were PVC plastic tubings. The diameter of experimental PVC tubings is 40 mm, the wall thickness is 2.4 mm and the maximal bursting pressure is 12.5 bar. There were four PVC tubings. Each has a single hole with diameter of 0.9mm、 1.1mm、 1.3mm and 1.5mm.

以直径为40mm，壁厚为2.4mm，最大爆破压力为12.5bar的PVC管为实验材料，首先研究了在0.9bar、1.2bar、1.5bar、1.8bar、2.1bar这5种工作压力下喷孔孔径分别为0.9mm、1.1mm、1.3mm、1.5mm的单孔流量及近似射程，根据实验结果最终选择近似射程最远，喷孔孔径为1.3mm的微喷灌管作为单孔喷水量分布特性研究。

It is shown that the ratio of relaxed value of residual stress to the original residual ...

研究表明，在高压聚乙烯反应管开停工的循环载荷和 34 0℃时的均匀温度场作用下，2 0年内管内壁自增强残余应力衰减量与初始残余应力值的比率在 5 3%以下。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。