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     JB Hefei Mattei compressors to participate in the drafting / T4253-2013 "general use fuel injection air compressor vane" was officially launched in March 2014, instead of the standard JB / T4253-2002 "general use injection vane air compressor ", which updates the normative references, performance, safety in more detailed classification requirements, improve part performance, increased vibration intensity and energy efficiency rating requirements and a corresponding increase in the test methods. Hope the relevant units according to the new standard production implementation.