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-extractingpump.
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。
2
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。
3
Salt pump is one of the key units in tube extracting equipment.