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JJG 975-2002 English PDF (JJG975-2002)

JJG 975-2002 English PDF (JJG975-2002)

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JJG 975-2002: Verification regulation of chemical oxygen demand (COD) meters
This Regulation is applicable to the first-time verification, follow-up verification, and inservice inspection of the chemical oxygen demand meters; while the calibration of online chemical oxygen demand meters can refer to this Regulation for implementation.

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