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GB/T 40344.3-2024_Chinese: Vacuum technology - Standard methods for measuring vacuum pump performance - Part 3: Specific parameters for mechanical booster vacuum pumps (Chinese: 真空技术 真空泵性能测量标准方法 第3部分：机械增压泵的特定参数) Note/Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working-hours typically, ASAP English versions: GB/T 40344.3-2024
