An utterly new conception was proposed of a device on gathering and storing scattered wind power that exists in nature. Such economizing pick-up device can be equipped on the oil-extracting pump.
提出一种可以随机采集在自然界广泛存在的零星风力的装置，用于石油抽油泵的节能。
The extracting fault features approach based on high-order spectral for pump valves of reciprocating pump was investigated, especially third order spectral analysis.
研究了基于高阶谱（主要是三阶谱）和主元分析的故障特征提取方法。
The ejecting ratio of heat pump will vary with the pressure of working steam, extracting steam and the mixture in the process of operation, which will corrupt the normal operation of heat pump.
喷射式热泵的引射系数在运行过程中会因工作蒸汽的压力、引射蒸汽的压力和混合蒸汽出口压力的变化而发生较大的改变，这对于保证热泵的正常工作是不利的；
The single screw oil pump is a new type extracting oil pump, which is simple in structure and high in performance with low working cost.
单螺杆抽油泵是一种新型的采油泵，结构简单，性能可靠，作业成本低。
The single screw oil pump is a new type extracting oil pump, which is simple in structure and high in performance with low working cost.
单螺杆抽油泵是一种新型的采油泵，结构简单，性能可靠，作业成本低。
应用推荐