压下的

It's fixed by swing depressor fixtume structure thedespower can be assured by checking computations.

在前述定位基准面选择的前提下，用摆动式压板杠杆夹紧结构，夹紧力经验算可以保证。

It's fixed by swing depressor fixtume structure the despower can be assured by checking computations.

在前述定位基准面选择的前提下，用摆动式压板杠杆夹紧结构，夹紧力经验算可以保证。

It is shown that both deviator stress and confining Stress greatly affect resilient modulus, and the influence of water content is great. Degree of compaction is also an important factor affecting resilient modulus.

结果表明：偏应力σ(下标d和侧向应力(σ3)对路基土回弹模量均有显著影响，含水量对路基土回弹模量的影响非常大，而压实度同样是一个主要影响因素。

Based on above results, and combined with diagenesis, the controlling factors of reservoirs are discussed.

在煤系地层酸性环境下，强烈压实作用是形成普遍低渗的主要原因。

Negative coefficients occur where there is a downward decrease in velocity and density: for example, at the top of an over pressured shale diapir

只有当速度和密度向下减少时，例如在超压页岩穿刺体的顶部，反射系数才会出现负值。

New ideas and methods in the paper:1 The formulas on perforated casing collapse strength were deducted, which offereda convenient method to analyze the relationship between casing collapse strength and perforation;2 The stress and displacement formulas on the system of casing, cement anddeformation under the non-uniform load were deducted, which offered the theoretical found for designing optimally casing string;3 The relationship between structure in-situ field of whole oil field and casing failurewere studied, which offered the scheme for the prediction of casing failure. The process of study in the paper:1 For simulating the relationship between the structure in-situ field and the casingfailure in the oil-deformation, the tests of the uniaxial tensile, compress, tnaxial compress and dilatability were made on the samples of the drill cores from deformation of casing failure position in Yuejing II oil field.

本文的主要创新： 1推导出了射孔套管抗挤强度的解析式，为分析射孔与套管强度的变化关系提供了简便的方法； 2推导出了非均匀地层载荷作用下套管、水泥环和地层组合体的应力和位移解析式，并非均匀作用下套管柱优化设计提供了理论依据； 3研究整个油田区块构造应力场与套管损坏关系，为预测套管损坏提供了可行方案；本文的研究过程如下： 1为模拟构造应力场与油层段套管损坏关系，做了大量的岩石单轴抗拉、单轴抗压、三轴试验以及岩石遇水膨胀试验，获得了研究区块岩石的弹性模量、泊松比、内聚力、内摩擦角以及岩石的线膨胀系数，这此数据为本文研究油层段套管损坏机理研究的理论分析和有限元法提供了实验数据。

In a certain temperature and pressure conditions , fluid and wall rock constant interaction can produce all types of minerals DRUSE well developed .

在一定温压条件下，流体和洞壁围岩不断相互作用，才能生成各种发育完好的矿物晶簇。

In order to be deformed, the sections must be made with resins of high elongation at break.

这样，在不出现机械损伤的情况下，槽罐被压扁后可恢复原形。

Mudstone undercompaction phenomenon is one of the important characters of Eocene strata in the Dongtai depression of the Subei basin.

泥岩欠压实现象是苏北地区，特别是苏北盆地东台坳陷下第三系地层中重要的地质特征之一。

A narrow strip of wood used to fasten down the edges of the material that covers hatches in foul weather.

压板条：一种用来固定在恶劣天气下遮盖船舱口材料边缘的窄木条。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。