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Observed in simulation, three kinds of structural design and components sealed lips of special design to prevent the micro-fine sand into the plunger 2 within the pump barrel Friction.

模拟试验中观察,3种密封的结构设计和组件的特种唇边设计,阻止了微细砂进入柱塞2泵筒摩擦副内。

This special combination packing play a very important role in the sealing of high pressure peston pump.

这种特殊组合盘根在高压柱式泵的密封中起了非常重要的作用。

The result showed that, the carp otoliths of Heilongjiang Lianhuan Lake and Beijing city Miyun Reservoir has the ball aragonite and the column aragonite two kind of crystal types. The characteristics has relation to the average temperature and the difference in temperature of the water.

研究结果初步显示:黑龙江连环湖和北京密云水库两水域的鲤鱼耳石中分别具有球文石和柱文石两种晶体类型,这与水体的平均温度及昼夜温差有关。

This paper put forward the method of calculating the number over teeth and pin diameter on the great addendum modification gear,and gave the number over teeth and pin diameter caIculation formulas easy to use in the work with curve fitting method.

文章提出了解决大变位齿轮跨齿数计算和量柱直径选取中存在问题的方法,给出了计算公式,用曲线拟会方法得出了便于使用的大变位齿轮跨齿数计算公式。

The fundamental and method of the ground-based microwave radiometer remote sensing retrieval of integrated water vapor and cloud liquid water in the atmosphere are introduced herein.

介绍了地基微波辐射计遥感反演大气柱中的水汽总量和云液态水总量的辐射传输原理和反演方法。

In the case of view,operating in Jinan City,the owners of the valve pipe fitting industry,where most of Wu Peicong provinces,theyCheck Valves formed Association,some of which were in alliance,receiving inspection to establish aconspiracy of silence so hard to in-depth examination.

就本案来看,在济南市经营阀门管件行业的业主,大部分柱塞阀是吴培聪所在省份的人,他们成立同乡会,此中部分人结成同盟,在接受检查时建立攻守同盟,使检查难以深入。

So,it is neces-sary to have a stabilized platform in the tool to obtain steady angle adjustable and independent to the rotation of drilling string.

因此,在调制式旋转导向工具中,就必须设置一个不受钻柱影响的、可以自动保持和调整工具面角度的稳定平台。

Because of special geometry structure of three-cone bit, the top of formation will form a tri-spine well bottom while drilling with three-cone bit the drill string. It is the tri-spine well bottom that leads to the axial harmonic of vibration when the bit revolves a round and the three concavo-convex heave of bit and formation result in one time (1×rpm),two time (2×rpm), three time (3×rpm) turning table speed.

高岩由于三牙轮钻头的特殊几何结构,钻进过程中在岩层顶部容易形成一个三脊状井底,正是这一三脊状井底,当钻头旋转一周时钻柱轴向三次凸凹变化,由此在轴向产生1倍、2倍和3倍及其更高次倍于转盘转速rpm的谐波振动。

Because of special geometry structure of three-cone bit, the top of formation will form a tri-spine well bottom while drilling with three-cone bit the drill string. It is the tri-spine well bottom that leads to the axial harmonic of vibration when the bit revolves a round and the three concavo-convex heave of bit and formation result in one time (1×rpm),two time (2×rpm), three time (3×rpm) turning table speed.

高岩摘要:由于三牙轮钻头的特殊几何结构,钻进过程中在岩层顶部容易形成一个三脊状井底,正是这一三脊状井底,当钻头旋转一周时钻柱轴向三次凸凹变化,由此在轴向产生1倍、2倍和3倍及其更高次倍于转盘转速rpm的谐波振动。

A fast gas chromatography method with short micro-bore capillary column was developed for the determination of underivatized long-chain fatty acids in edible oils .

建立了利用短的微径色谱柱直接测定食用油中未衍生化长链脂肪酸的快速气相色谱方法。

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