GB - Chinese national standards

Types and dimensions of lamp caps - Part 4: Miscellaneous caps

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Types and dimensions of lamp caps - Part 5Bayonet caps

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Gas analysis--Preparation of calibration gas mixtures--Manometric method

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Specification for examination and approval of variety of forest tree

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Conservation principle and method of germplasm resources of forest trees

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Testing methods for wood adhesives and resins

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Specifications for optical fibre chromatic dispersion measuring set

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Measurement specification for birefractance crystal and polarizer

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Technical specification for He-Ne lasers

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Insulating materials—Test methods for electric strength—Part 1: Test at power frequencies

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