发明申请
US20070243091A1 Pump rotor seal apparatus and method 有权
泵转子密封装置及方法

Pump rotor seal apparatus and method
摘要:
An improved pump and pumping method includes a circumferential positive displacement pump having two counter rotating rotors. A clearance gap is defined between the rotor shaft, and a body hub portion of the body that forms the chamber.
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