leak detection and location system for oil pipe based on negative pressure wave method

field test of leakage light hydrocarbon pipeline monitoring technique based on negative pressure wave

轻烃管道负压波泄漏防盗监测技术现场试验

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research on filtering technique for negative pressure wave signals

负压波信号的滤波技术研究

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judgement of leakage position in oil transfer line by negative-pressure wave principle

利用负压波原理判断输油管线泄漏位置

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application of the negative pressure wave theory in the leak-detecting system of trans-porting-oil pipe

负压波定位理论在输油管道泄漏监测系统中应用

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correlation analysis in developing accuracy of pipe leakage detection system of negative pressure wave

用相关分析提高管道压力波泄漏检测系统的定位精度

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inspection and orientation of pipeline leakage with negative pressure wave technique

负压波管道泄漏检测与定位技术

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in this paper, the negative pressure wave method for pipeline leak detection and location of.

本文研究了负压波法在管道泄漏判断和定位中的应用。

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global oceanic contribution to annual polar wobble

全球海洋对极移周年运动的激发

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it then developed into a polar wobble, with the n pole being pushed away.

然后这个摆动发展为了一种极性的摆动，地球的北极被推离。

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report of duck toxicosis on pollution of river by sulphuric acid

浓硫酸污染河道造成鸭中毒的报道

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analysis on present situation of pollution of river and its control countermeasures in jincheng city

晋城境内河流污染现状分析及防治对策

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the pollution of river was one of the outstanding problems of the water resource in our country.

河流污染是我国水资源的突出问题之一。

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pollution of river also affects people and environment.

河流污染也影响着人类和环境。

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in addition, pk operation in the game lays stress on the refreshing and mighty opposite sense.

最后，游戏中PK操作强调爽快感、对峙感。战斗感觉非常爽快。

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geographical differences, linguistic barriers, and the wish to preserve local cultural traditions acted in the opposite sense.

地理上的差异，语言上的障碍，和维护地方文化传统的要求，又使世界在相反的意义上运行。

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application of medium caving support in medium - thickness seam

中位放顶煤支架开采中厚煤层的实践

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approach on changing product structure with medium thickness seam dealing system

改变中煤处理系统产品结构的探讨

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on technology with gas prevention and control of gob- side roadway excavation in medium- thickness seam

中厚煤层沿空掘巷瓦斯防治技术初探

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preliminary discussion on seam infusion in high-gassy medium-thickness seam face with caving mining method

高瓦斯中厚煤层放顶煤工作面煤层注水初探

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technology of the mining method of top - coal caving with movable support for medium- thickness seam

中厚煤层悬移支架放顶煤技术

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