China National Standards

China 2：Positive GB Standards List

  •  China "2：Positive" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 40344.2-2021 Vacuum technology—Standard methods for measuring vacuum-pump performance— Part 2：Positive displacement vacuum pumps
    真空技术 真空泵性能测量标准方法 第2部分：容积真空泵    		 China National Standards
    2：Positive
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