两管的

Thin-walled tube with closed section is commonly used in large space structures. In order to calculate the time-dependent temperature fields in these structures subjected to heat flux and emitting thermal energy by radiation, the temperature gradients along both the axes and circumferences of the tubes should be considered.

薄壁闭口管是大型空间结构中的常用元件，为准确地计算以其为组件的空间结构在太空辐射换热条件下的瞬态温度场，必须同时考虑沿管轴向与横截面周向两个方向的温度梯度。

According to Principle of quiescent sedimentation granula analysis, the densimeter method and the piette method are used to get the size grading of fine-grain soil and the errors of two methods are analyzed.

根据静水沉降颗粒分析法计算公式原理，分别采用了常用的密度计法和移液管法求取细颗粒土的粒径级配，分析了两种方法试验误差产生的原因，并证明密度计法较移液管法具有更简便、准确、节能的特点，建议尽量采用密度计法。

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。

Experimental measurement of oil-water two-phase flow was carried out by Venturis on 25 and 40mm diameter pipes, respectively.

实验采用25和40mm两种管径的文丘里管进行了油水两相流流量测量。

Through the analysis of the advantages and disadvantages of both Venturis and Coriolis flow meters, a double parameter measurement method is put forward with the combination of them both.

通过对文丘里管和Coriolis流量计测量油水两相流各自的优点和存在的问题分析，提出了文丘里管和Coriolis流量计相结合的双参数测量方法。

"A person has two box, a control box to speak do not speak of a pipe box, smart people know when to speak when the words should not ......"

&一个人有两个匣子，一个管说话的匣子一个管不说话的匣子，聪明的人知道什么时候该说话什么时候不该说话……&

Gas phase flow rate of two-phase flow was studied based on homogeneous flow model with slip model used void fraction sensor and venturi tube in this paper.

本文利用文丘里管和含气率传感器对空气水两相流气相流量计算方法进行了研究，在均相流模型基础上考虑了滑速比因素造成的影响，探讨了两相流气相流量计算方法。

To overcome the difficulties in measuring the oil-water two-phase flow ,the oil-water two-phase flow regime was studied with a horizontal Venturi tube and a model of flow measurement was established.

针对油水两相流的测量难题，利用文丘里管对水平管内油水两相流流型进行了研究。

To raise the water up again, a crankshaft and two levers drive a two-cylinder piston pump which lifts the water to the feeding canal of the water wheel.

为了提高水了，曲轴和两个杠杆推动两缸柱塞泵的升降机水喂养管水车。

For achieving high resolution, it is necessary to reduce the aberrations of electron guns and deflection coils.

影响彩色显象管分辨率的因素很多，其中电子枪和偏转系统质量的好坏是影响彩色显象管分辨率的两个重要因素。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。