Lenses and sets of lenses of railway transport light signal. Luminous intensity and local distance measuring methods
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Complete sets of light filter-lens and lens for railway lens signal lights. Specifications
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Ellipsoid reflector for searchlight railway signal lights. Specification
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Blanks of optical glass. Specifications
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Glass filters, filter-lenses, lenses, light diffusers and deflecting glass inserts for railway transport light-signals
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Glass dissipators for autotractor, motor-cycle and bicycle lighting and light signalling apparatus. Specifications
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Lenses for telephone switchboards. Specifications
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Vehicle signal light filters. Method for determination of chromacity and transmission coefficient
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Fresnel lenses for motion-picture studio spotlights. Basic parameters, dimensions and measuring methods
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Uniform provisions concerning the approval of safety glazing and glazing material
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Parts for the low-pressure mercury lamps
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Glass elements. General specification
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