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GB/T 14420-2024 Chinese PDF (GB/T14420-2024)GB T 14420 2024_Chinese: Analysis of water used in boiler and cooling system Determination of chemical oxygen demand Rapid method with potassium dichromate (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 14420 2024
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GB/T 14420-2024 Chinese PDF (GB/T14420-2024)
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