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1)  small-diameter design
小直径设计
2)  small diameter coiled tubing operation equipment
小直径连续管作业设备
1.
For the purpose of implementing a microscopic overall structure of the small diameter coiled tubing operation equipment,a modular and integrated design is provided for hydraulic system and automatization design is adopted in electric control system and digitized .
鉴于目前国内排水采气设备的现状以及橇装式小直径连续管排水采气作业设备的需要,研发了小直径连续管作业设备电液集成控制系统。
3)  Small Diameter Quartz Pressure Gauge
小直径石英压力计
1.
Design and Application of the Small Diameter Quartz Pressure Gauge;
小直径石英压力计的设计与应用
4)  small diameter vibration-proof pressure gauge
小直径抗震压力计
5)  impeller diameter maximum approach
叶轮极大直径设计法
1.
The impeller diameter maximum approach has been developed to solve the problem that deep well pump diameter was restricted by the well diameter.
针对深井离心泵外径受井径限制的结构条件,研究了一种深井离心泵叶轮极大直径设计法,其特点是将叶轮前盖板直径扩大到泵体内壁边缘,使叶轮直径在相应的井径条件下达到极大值,它与反导叶导流壳配套,可以使泵体轴向长度减短到极小值。
6)  small diameter
小直径
1.
Monitoring and Analysis of a Deep Circular Excavation in Small Diameter;
小直径圆形深基坑的施工监测与分析
2.
A number of questions that the hard alloy hob and the small diameter hob design have conducted the analysis research.
滚齿是齿轮加工的高效传统工艺,就其滚刀的设计如何适应齿轮传动技术发展的关键问题,即提高滚齿的加工效率和滚刀的耐用度进行了探讨,并对硬质合金滚刀和小直径滚刀设计中的若干问题进行了分析研究。
3.
To the complex fishing of electric submersible pump when being jammed in the casing with small diameter, the paper presets the difficulty of fishing, security and related process measures.
针对电潜泵在小直径套管中遇卡打捞的复杂性,提出了打捞的难度、风险和工艺措施, 通过现场两口井的应用,打捞一次成功。
补充资料:当量比表面直径、表面积体积平均直径
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性质:又称当量比表面直径、表面积体积平均直径。是颗粒群表面积分布的平均直径。其意义为与颗粒群的粒形相同,总体积相同、总表面积相同,且粒度均匀的一个假想颗粒群的粒度。亦即指与该颗粒群的粒形相同,比表面积相同的一个颗粒的粒度。 

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