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Patent Certificate
Apparatus and Method for Maintaining Vacuum in Condenser of Thermal Power Plant
Patent number: ZL 2013 1 0006450.7
Rotary Roots Pump Rotor
Patent number: ZL 2013 1 0479887.2
Multi-stage Roots Pump
Patent number: ZL 2013 1 0488072.0
Variable Internal Pressure Screw Vacuum Pump
Patent number: ZL 2015 1 0477187.9
A Screw Vacuum Pump with a Dynamic Seal Structure
Patent number: ZL 2015 1 0918080.3
Special Claw-Type Rotor Profile
Patent number: ZL 2016 1 0257182.X
Oil Film Dust Collector and Cooler for Vacuum Steelmaking and Its Dust Removal Method
Patent number: ZL 2016 1 0296944.7
Performance Testing System for Roots Vacuum Pumps and Its Testing Method
Patent number: ZL 2016 1 0296962.5
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