查询词典 core boring

Diamond core bit,Core barrel,Drill rod

金刚石钻头，钻具，钻杆

The pin top for pre-selecting is welded on the bottom part of the bracket of core drill, the pin top is in favor of the localization of drilling hole, at the same time, it can overcome the reversal angular force acted on the core device, it enhances the rigidity of the whole mechanism.

起预定位作用的尖顶焊接于取芯钻机的机架底部，尖顶有利于钻进初始阶段时钻孔的定位，同时还能够克服作用于取芯器的反转矩，提高了整个机构的刚度。

With Silicon rubber core,High elastic rubber core can absorb vibration, to control leakage.

超强弹力的硅胶芯，可弥补因振动产生的缝隙，从而控制泄漏。

Its birth is in key word is decision-making in to the search engine optimizes worker enlarge wide train of thought, basis before circumstance, major search engine optimizes service business to pay close attention to most is the core key word in the website, rank that those who emphasize also is core key word, and oversight the key word of a few little flow.

它的诞生在关键字决策中给搜索引擎优化工作者扩宽了思路，根据以往的情况，大部分搜索引擎优化服务商关注最多的是网站中的核心关键字、强调的也是核心关键字的排名，而忽略了一些小流量的关键字。

Since Prahalad and Hamel released the paper entitled The Core Competence of Corporation in 1990, the research on core competence gradually became the focus of corporations and academes.

自1990 年普拉哈拉德和哈默尔发表《企业的核心竞争力》一文后，核心竞争力研究逐渐成为企业界和学术界所关注的热点问题。

The benchmark problem for GT MHR plutonium burner accidents is a part of the IAEA Coordinated Research Program on "heat transport and afterheat removal for GCR under accident conditions" The reactor performance and RCCS capability during normal operation and two loss of forced convection accidents are analyzed using THERMIX code Results shows that the core fuel temperature and the vessel temperature below the safety limits,and the RCCS can remove the residual heat from the core after the accid...

气体透平氦气模块堆标准题是国际原子能机构关于&高温气冷堆在事故工况下的热传输和余热载出&问题的合作研究计划的一部分。本文用THERMIX程序计算了稳态和两类丧失强迫冷却事故瞬态的反应堆温度分布以及空腔冷却系统的载热能力。计算结果表明，稳态及事故中燃料和压力容器的最高温度不超过安全限值，RCCS能够有效带出堆芯余热，保证反应堆安全

This paper emphasized on the effect of the displacement of the wire from the core center and the effect of the rotation of the core, two shapes of commonly used N-turn coils were analyzed, the detailed steps for the uncertainty evaluation of clamp ammeters were given finally.

本文分别从被测导体偏心度和倾斜度以及不同校验线圈对钳形表铁心磁感应强度的影响等几方面进行分析，并给出钳形电流表校准不确定度评定的具体方法与步骤。

The reservoir rock types in the region of interest are grain limestone, algal limestone, cryptite, siltstone, muddy limestone and mudstone. The thesis identified as a result of changes in the deposition causing the heterogeneity in plane, and then the geological oil reserves have been calculated in accordance with the areal heterogeneity.3、Based on the data of core analysis, bore logging, array induction imaging log and FMI, porosity and permeability model were built using regression analysis. Through testing 45 rock samples, a, b, m, n value were obtained and used to calculate single-layer oil saturation value using the Archie formula. According to the theory of laterolog and inductolog, resistivity ratio and cross plot were used to identification effective thickness. Effective thickness was identified delicately in 103 wells. Based on the over work, active porosity and oil saturation was calculated accurately.4、According to observation of 100 pieces of the thin slices, cast thin slices and 383m core in three wells, the chief diagenesis in this area were compaction, cementation, denudation and cataclasis. Cementation and denudation were universally influenced active porosity this area. The intergranular pores, residual pores and secondary pores were formed in thin carbonated reservoir of lacustrine facies.5、The influence of reservoir heterogeneity to reservoir calculation was analyzed systematically using actual data. And the conclusions were as follows:①The principal reason leading to oil distribution unequal is interior structural feature of reservoir in structural hydrocarbon reservoir.

确定了由于沉积微相的变化而导致的平面非均质性，进而在平面上按照平面非均质单元计算了石油地质储量。3、利用岩心分析、常规测井曲线与阵列感应、成像测井资料相结合，分岩性利用回归分析方法建立了储层孔隙度、渗透率模型；通过对45块岩样进行岩电试验，获取了a、b、m、n值，利用阿尔奇公式计算了各单层含油饱和度值；根据侧向电阻率和感应电阻率串并联特性，利用电阻率比值法与常规交会图法相结合重建了有效厚度图版，对全区103口井目的层段进行了有效厚度精细划分，通过以上工作，准确求取了储量计算单元内有效厚度参数、有效孔隙度参数以及含油饱和度参数。4、通过对研究区3口井383m岩心观察，100余块薄片、铸体薄片镜下鉴定得出：油泉子油田上、下油砂山组储层主要成岩作用是压实作用、胶结作用、溶蚀作用和破裂作用，其中溶蚀作用、胶结作用最普遍，这两种作用对有效孔隙度影响最大，以上成岩作用形成了原生粒间孔、粒间残余孔和次生孔隙(如粒间溶孔、粒内溶孔、铸模孔、晶间孔等)为主的薄层湖相碳酸盐岩储层。5、利用实际资料，系统分析了油藏非均质对储量计算的影响，认为：①对于构造油气藏而言，油气藏构造及断裂特征是造成油气分布不均的首要原因，储集条件相同的条件下，构造高部位有利于储存油气，油气在垂向的重力分异体现了油气藏内部构造的不均一特征。

It consists of the continuous extrusion process and the force-feed lubrication drawing process.By the means of the continuous extrusion process aluminum clads steel core,and then the steel core clad with aluminum is drawn into a finish product.

该技术为采用连续挤压包覆工艺制造毛坯，再通过强制润滑拉拔工艺将毛坯拉制成产品。

According to the request of IRB system in NBCA, this paper analyzes the core factors of IRB system, combs and portrays the IRB process adding the step of risk precaution, describes several quantitative methods of risk precaution and compares them, then collets the methods of credit rating, does some deep researches in measurement of PD which are the core contents of IRB system, and does some empirical analysis using EDF model, finally gives the application of the IRB system and draws the chart of credit risk quantization in terms of portfolio theory, wishes to provide beneficial reference for the development and improvement of Chinese commercial banks'IRB system.

本文按照巴塞尔新资本协议中内部评级系统的要求，分析和解读了内部评级系统中的关键要素，梳理并描画了添加风险预警环节后的内部评级流程，分析了风险预警的各种定量方法并进行了比较，然后汇总了信用评级的方法，深入研究了违约概率的测度方法，用EDF模型作了些实证分析，最后归纳整理出了内部评级系统的应用，并描画了基于资产组合的信用风险量化流程图，以期为我国商业银行内部评级系统的发展和完善提供有益的参考。

Many will continue to choose to live in duality and in conflict.

许多人将继续选择活在二元对立性和冲突中。

I find that students of the University of Physical Education all wear sportswear at first sight.

我发现：体育大学的学生乍一看，都是穿运动衣，大家都一样