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The actual production needs from oil field,aimed at tractor hoist that need replace pipe string and outside slippery jet pump that isn′t satisfied with discharge fracturing quickly in reality,a new type of jet pump inside sleeve type of jet pump is designed.

针对外滑套式射流泵在油田应用中不能满足压裂后快速排液的现况,研制出了一种新型的内滑套式射流泵,并提出了射流泵、喉嘴距、喉管长度、扩散管角度及长度的计算公式。

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On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面,更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。

You rap, you know we are not so good at rapping, huh?

你唱吧,你也知道我们并不那么擅长说唱,对吧?