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- Keywords twofold wall drill tools;up return velocity;deepen;air reverse circulation; 关键词双壁钻具;上返速度;加深;气举反循环;
- Water-proof double wall lining canopy. 防水及防雨式双层钢板保护外罩。
- This is a large on-going double wall pipe project. 这是一个很大的正在进行的双重管线项目。
- Double Wall: Threesheets of linerboard with two mediums in between. 双瓦楞纸板：二层芯纸夹在三层面纸之间。
- By the action of high roatry speed,excentric shaft connection intensifies the fatigue failure of drill tool. 为了达到较好的防斜目的,必须增大钻进时钻头的转速,在高转速的作用下,偏轴接头加剧了钻具先期疲劳失效。
- Most early installations have been in double wall pipes or tanks systems. 早期大多数都安装在双重管网和储油罐系统中。
- The operation performance of PDC bits with screw drill tool appplied now in oilfield were analyzed comprehensively. 综合分析了目前使用的PDC钻头和螺杆钻具工作特性。
- Stainless steel single and double wall temperature control containers. 不锈钢容器及带温控夹套砂磨筒。
- The drilling tool should be measured precisely. 请准确丈量钻具。
- C、Double Wall: Threesheets of linerboard with two mediums in between. 单瓦楞纸板：芯纸粘在二层箱板纸之间，也被称为双层纸板。
- These two days we have been laying down drill tools. 这两天我们都在甩钻具。
- This paper analyses the influence of excentric shaft connection on force case of drill tool,and discusses the causes of drill tool failure. 文中分析了使用偏轴接头对钻具各部分受力情况的影响及导致钻具失效的原因。
- Two methods for determining the critical length of the drill tool section below the hydrodynamic propulsor are presented. 给出了确定井下液力推进器以下钻具临界长度的两种方法。
- He hid his hard-earned two thousand yuan cash inside a double wall in his apartment. 他把辛苦得来的二千元现款藏在住处的夹层墙里。
- At last,accor ding to the different design claims,enumerate method and iteration of steerable drill tool is designed,and give some design exemples in different conditions. 最后,根据不同的设计要求,提出了设计导向钻具的枚举法和迭代法,并给出了各种条件下的设计示例。
- In order to attain the goal,the rotary speed of bit must be increased.By the action of high roatry speed,excentric shaft connection intensifies the fatigue failure of drill tool. 为了达到较好的防斜目的,必须增大钻进时钻头的转速,在高转速的作用下,偏轴接头加剧了钻具先期疲劳失效。
- Numerous jet fuel monitoring facilities for buried double wall pipe systems dating from the late 1980's to the present. 从80年代末到现在，我们给无数的军用机场燃料监控系统埋设双重地下管网系统。
- Designed for wall drilling of concrete block or brick without using water. 在无水环境下，适用于混凝土或者砖块上钻孔取样。
- Translucent unbreakable double wall Lexan(R) polycarbonate travel mug for hot or cold beverages. 半透明的;不容易碎的;两层壁的聚碳酸酯旅行杯;用来装冷热饮料.
- Includes the strongest double walled stainless steel inlet strainer available. 可提供最坚固的双夹层不锈钢进口过滤器。
