抽气

The separation action of the gas anchor eliminates the effect of the gas on the subsurface pump and improves the efficiency of the pump; the gravity-type anti-gas device carries out gas-fluid separation by gas-fluid separating principle and chimney stack criterion: while the laser slotted screen pipe ensures the OD of sand in the fluid less than 0.05mm.

闭式气锚的分离作用消除了气体对抽油泵的影响，提高了泵效；重力防气装置利用液气分离原理和高烟囱原理进行液气分离，液流回流时间可达10 min，排气最高压差可达0.2 MPa；经激光割缝筛管过滤后的液体含砂粒外径小于0.05 mm。

Rotary vane pumps can be sealed container extraction in the dry gas, with gas if the town of devices can also be drawn in addition to a certain amount of condensable gas.

旋片泵可以抽除密封容器中的干燥气体，若附有气镇装置，还可以抽除一定量的可凝性气体。

Rotary vane pump can be sealed container extraction in the dry gas, with gas if the town of devices can also be a certain amount of extraction that can be condensable gas.

旋片泵可以抽除密封容器中的干燥气体，若附有气镇装置，还可以抽除一定量的可凝性气体。

Combined with the carbonate reservoir characteristics as large gas rate,viscous crude and produced naturally,this paper regressively analyzes and matches the dynamic liquid level,submergence depth, pump efficiency ,water content,oil density and viscosity of 137 sucker rod pump wells.

针对塔河油田机抽井的沉没度大大高于中国石化平均水平的现状，结合塔河油田碳酸盐岩油藏气大、油稠、依靠天然能量开采的特点，对正常生产的130口有杆泵井的动液面、沉没度、泵效、含水、原油密度、原油黏度等数据进行了回归分析和拟合，给出了不同含水期、不同日产液量的机抽井合理沉没度范围。

At present, most large mechanical-electric facilities of gas deflation and facilities of gas storage are overwatched by labor in our country. A little carelessness will lead to accidents; and the important parameters such as the gas thickness in the deflation pipeline and deflation flow capacity must be calculated termly by labor, which results in the inconvenience in administration.

我国目前大多数瓦斯抽放或加压泵房的大型机电设备和储气设施，都是靠人工昼夜看守，稍有疏忽，就会发生事故；抽放管道的瓦斯浓度，抽放流量等重要参数也只能定期进行人工测算，不便于管理。

The result shows that pump efficiency is increased to above 70% and pump inspection period is above 4 months, obviously higher than that of conventional gas drainage recovery by pump, which meets the demand of gas drainage recovery.

结果表明，应用新的配套技术后泵效在70%以上、检泵周期超过4个月，明显高于常规机抽排水采气技术水平，较好地满足了机抽排水采气的需要。

A high-quality neon tube manufacturing process include: bombardment degassing, vacuum and maintain vacuum and inert gas filled into the three major areas, while the bombardment degassing is the primary link, if a link is not sure is good, even if the neon vacuum pumped,"ultra-high vacuum", the use of neon tubes can not be long.

一根优质的霓虹灯管的制作工艺包括：轰击去气、抽真空及保持真空、充入惰性气体三个大环节，而轰击去气是首要环节，如果在个环节没把握好，就算把霓虹灯的真空抽到&超高真空&，霓虹灯管也使用不了多长时间。

After the leak detection valve and the chamber evacuation valve are closed we vent the chamber and we draw off the helium.

在泄漏检测阀门和气室抽真空阀门关闭后，我们给气室放气并排除氦气。

Flow-field simulation shows that radial pressure gradient goes down fast and air flowrate is nearly directly proportional to the well vacuum and the soil permeability coefficient. It also indicates that stop-off coating will play an important role in SVE.

采用Galerkin三角形有限单元法对复合地表边界的竖井土壤气相抽提稳态流动问题进行了数值模拟分析，模拟结果显示：气相压力沿径向梯度迅速下降，抽提流量与土壤通透系数及真空度呈现高度相关的正比例关系，且地表隔绝覆盖层对流场影响很大。

Using RFPA2D-Flow stereo-gasses coupled system to simulate the process of gas draiange in lower air permeability coal seam by loose blasting,it interprets that loose blasting is a effective ways to increase air permeability in low air permeability coal seam .

运用RFPA2D-Flow固气耦合系统模拟了松动爆破抽放低透气性煤层内瓦斯的过程，解释了爆破松动是增加低透气性煤层透气性的有效途径，本文对松动爆破前后抽放过程中煤层内瓦斯压力和瓦斯渗流场的变化规律进行了数值模拟对比，为进一步理解瓦斯抽放、松动爆破增透机理等提供理论基础和科学依据。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。