泵杆

Machinery and other production methods, screw pump system is characterized by a higher system efficiency, a study of its great significance.

与其它机械采油方式相比，螺杆泵采油系统的突出特点是系统效率较高，对其进行研究意义重大。

The computing procedure of all profile s design for double screw pump has been.

介绍了双螺杆泵各类型面设计的计算机设计程序。

Now,the entire screw pump used is made in our country,and one serious problem exists in all of that is the performance of the material of the stator .

现今所用的螺杆泵绝大部分是国产的，普遍存在的一个较严重的问题：定子橡胶材料的性能问题。

Screw pump selection should be guided by economic, rational and reliable principle.

螺杆泵选用应遵循经济、合理、可靠的原则。

As a result of this structure and the screw pump of the lateral gap between the existence, it can transport non-lubricating medium.

由于这种泵的结构和螺杆间存在的侧间隙，它可以输送非润滑性介质。

Screw pump used should follow the economic, rational and reliable principle.

螺杆泵选用应遵循经济、合理、可靠的原则。

Group Seven holding company , are set to design, develop, manufacture, sale and service to a variety of double, three screw pump, low pressure gear pump-driven variety of valve products in large-scale production of specialized manufacturers.

集团下属七大控股公司，是集设计，开发，制造，销售，服务于一体，以各种双，三螺杆泵，低压齿轮输油泵各种阀门为主导产品的专业化大型生产产家。

Screw can tolerate sand strata.

螺杆泵能耐受地层出砂。

Air is transfened into hot air by passing through the heater,and goesinto the hotair separator on the top of he dryer,then goes into the drying room evenly.at the same time liquid materials are sent to the centrifugal atomixer on the top of the dryer the the screw pump with stepless speed regulation,and atomized into timy dr-oplet which will contact hot air,then dried into dry product within shortest time.

空气通过加热器转化为热空气，进入装置在干燥室顶部的热风分配器，然后均匀的进入干燥室，同时通过无级调速的螺杆泵将料液送至装置在干燥室顶部的雾化器，使料液雾化成极小的雾化液滴，料液和热空气并流接触，水份迅速蒸发在极短的时间内干燥为成口若悬河，成品经干燥塔底部和旋风分离器排出，废气由风机抽出排空。

Drilling mud is pumped down the inside of the drill pipe, through jet nozzles in the bit, and into the "annulus".

钻井泥浆被泵入钻杆内部，从钻头的喷嘴流入环形空间。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。