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See Chinese contents: GB/T 2293-2019 GB/T 2293-2019: The method of quinoline-insoluble for pitch products of coal carbonization
This Standard specifies test principle, instruments and reagents, sampling and preparation of sample, test steps, test result calculation and allowable deviation for coal tar and quinoline-insoluble for pitch products of coal carbonization that uses coal tar to produce. This Standard is applicable to determinations of contents of coal tar and quinoline-insoluble for pitch products of coal carbonization that uses coal tar to produce.
