GB - Chinese national standards

Synchronous belt drives - Automotive belts - Determination of physical properties

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Carbon black—Determination of total and external surface areaNitrogen adsorption test method

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Chemical reagent - General method for the determination of metals by solvent extraction followed by AAS

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Primary chemical - Potassium hydrogen phthalate

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Primary chemical - Potassium dichromate

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Primary chemical - Potassium chloride

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Primary chemical - Sodium chloride

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Primary chemical - Ethylenediamine tetraacetic acid disodium salt

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Primary chemical - Sodium carbonate anhydrous

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Working chemical - Potassium chloride

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