GB - Chinese national standards

Ophthalmic optics - Contact lenses - Part 7: Physicochemical properties test methods

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Ophthalmic optics—Contact lenses—Part 8Determination of shelf-life

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Ophthalmic optics—Contact lenses—Part 9:Ageing by exposure to UV and visible radiation(in vitro method)

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Determination of resistance to heat of vitreous andporcelain enamels

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Vitreous and porcelain enamels - Enamelled cooking utensils - Determination of resistance to thermal shock

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Shell drills

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Vitreous and porcelain enamels—Test method of specular glossiness

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Oil of Litsea cubeba

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Oil of cassia, China

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Morse taper shank countersinks for angles 60° and 90°120° inclusive

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