GB - Chinese national standards

Classification and nomenclature for activated carbon

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Measuring method for chalcogenide infrared optical glass—Part 1: Homogeneity

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Measuring method for chalcogenide infrared optical glass—Part 2: Degree of striae

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Measuring method for chalcogenide infrared optical glass—Part 3: Impurity

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Measuring methods for chalcogenide infrared optical glass—Part 4: Coefficient of optical absorption

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Measuring methods for chalcogenide infrared optical glass—Part 5:Stress birefringence

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Rolling bearings—Measuring methods for friction torque

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Non-destructive testing—Ultrasonic testing—Test method for phased-array ultrasonic testing

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Nut design guide

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Surface chemical analysis—Recording and reporting data in Auger electron spectroscopy (AES)

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