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  •  China "chopper" GB Standards List:
  • Standard  Code GB Standard Title Standard Class Order
  • GB/T 25117.2-2010
  • Railway applications - Rolling stock - Combined testing - Part 2: Combined testing of chopper-fed direct current traction motors and their control system chopper
    China National Standards
  • GB 7681-2008
  • Safety technical requirements for choppers chopper
    China National GB Standards
  • GB/T 20788-2006
  • Tearing choppers chopper
    China National GB Standards
  • GB/T 3332-2004
  • Pulps--Determination of beatingdegree(Schopper-Riegler method) chopper
    China National Standards
  • SJ/T 9560.28-1993
  • Electro-mechanical chopper--Quality grading standard chopper
    China Electronics Standards
  • QB/T 1667-1992
  • (Paper air permeability (Schopper method) tester) chopper
    China Light Industry Standards
  • CJ/T 5003-1992
  • Specification for thyristor chopper of trolley bus chopper
    China Urban Construction industry Standards
  • SJ/T 10171.9-1991
  • Determination of air permeability through separator (medium range). Schopper method chopper
    China Electronics Standards

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