查询词典 perforation

The stress fields' distribution of the casing, cement, perforation and oil layer and the relationship between thestress of casing and the quantities of sand production were established in the paper.

大量出砂使地层结构承载能力下降，导致套管内外压力变化，在热应力的作用下，引起套管弯曲，使得局部应力集中，从而使出砂层段及周围的套管应力增加。

The web perforation can provide space for electrical conduits and bracing. Therefore, it has the meanings and motive for the study of C-shaped section with web openings. The strength of a compression member can be influenced by the section shape, thickness of section, length of member, and support condition.

不过，构材之厚度、加劲与未加劲、是否开孔、上下两端之接合方式，皆会影响受压构材之抗压能力，所以目前先针对C形断面构材的开孔与否及上下两端之接合方式，分别以两种尺寸来讨论，并藉由有限元素分析软体ANSYS 6.0版，来模拟构件受压时，断面的应力分布情形。

Results All fifty-four adenomata were excised with electrotomy.The adenomata distributed mainly over left-side colon（47/54）.Bleeding occurred in five patients during the operation（5/26）.None had delayed bleeding and perforation after endo-scopic therapy.

结果 54颗腺瘤全部采用电切除术切除，腺瘤主要分布在左半结肠（47/54），术中出血5例（5/26），全部患者无术后迟发性出血、腹痛和穿孔发生。

Methods: According to cecum ligation perforation method, the sepsis model was prepared.

采用盲肠结扎穿孔术制备脓毒症模型。

Accord to high water containing developing period of Daqing oilfield and actual situation of case damaged seriously in water and oil wells, a set of explosive perforation tech for case d well is introduced.

针对大庆油田开发进入高含水开采阶段，油水井套管损坏显著加快的实际情况，介绍了套损井爆炸打通道工艺技术。

Drill pipes often work in abominable conditions under alternating stress and the friction collision between drill pipe and borehole wall, which puts drill pipes in the weakest component in the whole drilling equipment and tools, the crack propagation results in perforation or part often emerge.

钻杆常处于交变应力并且在与井壁摩擦碰撞的恶劣条件下工作，往往成为整个钻井设备与工具中最薄弱的环节，由裂纹发展致穿孔或完全断裂时有发生。

Light glass ionomer cement is considered to be a better material for repairing perforation of pulp floor and Its efficiency related to peforation diameter.

LGIC是修复髓室底穿孔较好的一种材料，其疗效与穿孔大小有关。

As to multi-layer reservoirs,each layer can be divided into three areas:area of gravel-packing,area of perforation and area of radial flow.Each area has its own governing equaiton and the solution is expressed by Green function.The well bore pressure and layer-rate is given through Green function in Laplace space.The pressure drop and skin factor isobtained also in each area.

根据多层砾石充填完井的渗流特点，将每个产层在径向上分成3个区域，即砾石充填区、射孔区、地层径向流区，每个区域有各自的渗流方程，对n层油藏有3n个渗流方程，将每个区域的方程用Green函数来表示，由各层的Green函数得到井筒混合压力、分层压力及分层产量在Laplace空间上的解，最后得到每层各区域的压力损失、表皮系数以及井底压力和分层产量与时间的变化关系。

The most high-precision machine-cut to about 0.003 mm, perforation of the smallest Hole diameter of 0.3 holes to play.

线割机最高精度达到0.003mm左右，穿孔机最小孔可打直径0.3小孔。

In order to protect the old and new customer requirements for the comprehensiveness of the material, the company's new large-scale expansion on the two sets of pipe using IF heated to 800 degrees, made of alloy Mandril perforation, which increased the density of steel structures, improve the scope of application, production specification 305-1422 * 20-120, to make up for the Gang, Steel and other steel products several vacancies.

为保障新老客户的所需材料的全面性，公司新上大型扩管机两套，采用中频加热至800度，用合金芯棒穿孔制成，该技术增加了钢结构的密实度，提高了应用范围，生产规格Φ305-1422*20-120，弥补了成钢、包钢等几大钢厂产品的空缺。

We got alerted a couple of times while we were down south that HETs were on the way to bring us back up north because things were going to go hot again, but it was just rumors.

南下的途中我们不只一次得到警告说重型装备运输车将拉着我们重新北上，因为局势正在变得重新紧张起来，但这只是谣传。

It's the one where they find the ghost in the salt mine.

这一集是演他们在盐矿找到鬼