two-bank stage pump

Characteristics analysis for NASH two-stage cone type water ring vacuum pump

NASH双级锥体水环真空泵特性分析

THE DESIGN AND PERFORMANCE ANALYSIS OF SINGLE-STAGE COMPRESSION REGENERATIVE REFRIGERATION CYCLE USING MIXED REFRIGERANTS Study on Characteristics of the Ejector in Quasi Two-Stage Compression Heat Pump Coupled with Ejector

混合工质单级压缩回热制冷系统的设计与性能分析准二级压缩&喷射复合热泵系统用喷射器的性能研究

In the stage of cold production, two lifting methods as screw pipe pump and rod pump can be applied, with assisting viscosity reducing measures which include adding viscosity reducing agent through the hollow rod or the production casing annular and electrical rod heating.

在冷采阶段可采用螺杆泵和有杆泵2种举升方式，均需辅以降黏措施，降黏方式有空心杆掺入降黏剂、油套环空掺降黏剂和电杆伴热3种。

The structural and hydraulic design method is presented low-specific-speed highspeed centrifugal pump with two-stage complex impeller.

阐述了两级复合叶轮高速泵的结构设计特点和水力设计方法.

Experimental Research of a Two-stage Air-source Heat Pump for Residential Heating

双级压缩空气源热泵采暖系统实验研究