查询词典 tube well

For example, a small low-cost wide-field refractor like the 80mm f/5 "short tube" achromats cannot easily compete with the performance of an expensive 3 element Apochromat, nor should it be expected to. These inexpensive scopes don't generally perform as well at higher powers, but they were never designed to do so.

比如像80F5这种小的低成本宽视场折射镜和与价格昂贵的三片APO根本没法比，虽然这些廉价的镜子高倍表现不好，但是它的设计本来也不是为了上高倍。

It is better to choose small diameter catheter as far as possible if it does not request super-speed drop. It's best to choose basilic vein at first, especially the right side, with the puncture point going over the elbow joint; and the next best choice is the jugular external vein on the right side as well. Thereby, it is better to choose cautiously the PICC tube operation and make detailed valuation before operation.

在非高速度滴注的情况下，尽量选用小管径的导管；对血管的选择应当首选贵要静脉，优选右侧，穿刺点最好过肘关节，其次选择颈外静脉优选右侧；选择PICC置管操作应慎重，操作之前做好详细的评估。

Conventional imaging technique which unsubtracted bone was used first,use 3D treatment on workstation to reconstruct cerebral vessels,to diagnose aneurysm,vascular malformation and tumor as well as to evaluate the preoperative and postoperative efficacy.Subtract bone techniques including one by one slice subtraction,semi-automatic digital subtraction radiography,matched mask bone elimination and control tube exposure light spot imaging technique can show the vessels more clear without the interference of bone as well as the relationship between vessel and pathological changes more accuracy.

首先是未去骨的常规成像技术，利用工作站进行多平面重建技术、最大密度投影、容积再现、表面遮盖法等多种三维处理得到头部血管及肿瘤图像，对动脉瘤、血管畸形及肿瘤血管进行病变诊断及术前、术后评价；其次是近年出现的逐层减影、半自动数字减影、匹配蒙片骨去除法及控制球管曝光点的减影等去除颅骨的减影技术，没有颅骨的干扰血管显示更加清楚，血管与病变关系显示更准确。

CXD-tube-type electrostatic precipitator, CXF-type hybrid electric precipitator, CXS Dual-field electrostatic precipitator, CXW horizontal electrostatic precipitator, UF Series Single Bag Filter, MDC coal mill anti-anti-static bag dust collector browser, LFEF shaft kiln dryer and bag dust collector, ZC mechanical cleaning bag dust collector bag filter, etc. as well as various accessories I have become well-known plant products, and environmental protection department's endorsement.

CXD型管式电除尘器、CXF型复合式电除尘器、CXS型双电场电除尘器、CXW型卧式电除尘器、UF系列单机袋收尘器、MDC煤磨防暴防静电袋收尘器、LFEF烘干机及立窑袋收尘器、ZC机械反吹袋收尘器等以及各种袋除尘器配件都成为我厂的知名产品，并得到环保部门的认可。

In this paper, research on wellhead system stability of offshore oil self-elevating drilling platform exploratory well is introduced, the matching equipment technology and operation points such as wellhead casing head, offshore water isolation tube, mudline suspension flow, wellhead suspension system, and so on are analyzed and researched by wellhead counterbalance and conventional well structure, and measures taken to ensure wellhead support flow stable are found.

对海洋石油自升式钻井平台探井井口系统稳定性研究进行了介绍，通过对井口配重、常规井身结构、井口套管头、海上隔水导管、泥线悬挂流及井口悬吊系统等配套设备技术和操作要点的分析研究，得出了确保井口支撑系统稳定应采取的措施。

Power slip is a tool used to clamp drill pipe or well tube on turntable for oil drilling at the mouth of the well.

动力卡瓦是油田钻井中用来把钻杆或套管夹紧在转盘上的井口工具。

In order to guarantee the normalcy of water-source heat pump heating system,except carries on the hydraulic calculation seriously in the design,correctly chooses each main branch caliber and ensures the rational distribution of flow,as well as uses the heating form of radiation comes from the earth or fancoil unit,but should also be strict to the quality surveillance in the process of sinking heat source well and recharge well's construction,according to the geological structure,arranges the tube funnel reasonably,and in the unit movement debugging,raises the overall efficiency positively,and achieves the economical operation.

为保证水源热泵供暖系统的正常，除了在设计中认真进行水力计算，正确选择各主支管管径，保证流量的合理分配及采用地辐辅或是风机盘管供暖形式外，还应在凿供、回灌井的施工过程中严格质量监督，根据地质结构，合理布置滤管，在机组运行调试中，积极提高机组效率，并达到经济运行。

With the deterioration of oil extracting condition and the increasingly high demand of the performance of the oil well tube , the development of high performance oil well casing has a vital practical significance.

随着采油条件越来越恶劣，对油井管的要求也越来越高，研制高性能油井套管有着重要的实际意义。

Selecting and using well tube filter is of far reaching importance for the construction of water well.

因而在水井建造中，选择使用优良的滤水管是至关重要的。

Those who educate children well are more tube honored than even their parents for these only give them life, those the art of living well.

把儿童教育好的人们甚至应该比儿童的父母更受尊敬，因为后者仅仅给予他们生命，前者却教给他们生活得良好的艺术。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。