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  • National Quality Supervision and Inspection Report for Power Electronic Products

  • Product Quality Inspection Report in Hebei Province

  • Utility model Certificate A simple circuit for detecting the zero crossing of power grid < BR >ZL 2022 2 0109289.0

  • Utility model Certificate Double CAN redundant loop network communication gateway < BR >ZL 2021 2 2901247.9

  • Utility model Certificate An electric control cabinet with the function of noise and dust reduction < BR >ZL 2019 2 2033964.7

  • Utility model Patent Certificate A variable speed fan driving protection device < BR >ZL2019 2 2033946.9

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