in large sinking well type pumping stations with a small forebay, when water from the diversion pipe enters the forebay, the flow become turbulent, thus a special flow phenomenon forms.
在一些大型给、排水沉井泵站的运行中,因前池尺寸偏小,水流自引水管进入前池后,突然扩散,流态紊乱,形成独特的水流现象。
oblique well type laser water level measurement equipment provides a new method of data acquisition and transmission for water level measurement under special conditions.
斜井式激光水位测量装置,为特殊条件下水位测量提供一种新的采集传输手段。
on the basis of analyzing the drilling cost influence factors, three assumptions to the drilling operation process are proposed:(1) the drilling cost of different well type structure is different;
在对油气鉆井成本影响因素进行分析的基础上,针对油气鉆井作业的过程提出三个假设:(1)不同的井型结构的鉆井成本是不同的;