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GB/T 7962.2-1987 Colourless optical glass test methods--Test method by collimator for optical homogeneity $180.00 via email in 1~3 business day valid
GB/T 7962.2-2010 Test methods of colourless optical glass—Part 2:Optical homogeneity—Fizeau plano-interferometry $120.00 immediately valid
GB/T 7962.20-1987 Colourless optical glass test methods; Density $184.00 via email in 1~3 business day superseded
GB/T 7962.20-2010 Test methods of colourless optical glass—Part 20:Density $180.00 immediately valid
GB/T 7962.21-1987 Colourless optical glass test methods; Knoop hardness $184.00 via email in 1~3 business day superseded
GB/T 7962.21-2019 Test method of colourless optical glass—Part 21:Resistance to attack by aqueous alkaline solutions $200.00 immediately valid
GB/T 7962.22-2019 Test method of colourless optical glass—Part 22:Resistance to attack by aqueous alkaline phosphate-containing $200.00 via email in 1~3 business day valid
GB/T 7962.23-2019 Test method of colourless optical glass—Part 23:Resistance to climatic $150.00 immediately valid
GB/T 7962.3-1987 Colourless optical glass test methods; Test method by holographic interference for optical homogeneity $105.00 via email in 1~3 business day superseded
GB/T 7962.3-2010 Test methods of colourless optical glass—Part 3:optical homogeity—Holographic interferometry $180.00 immediately valid
GB/T 7962.4-1987 Colourless optical glass test methods; Test method by multiple beam spherical interference for optical homogeneity $45.00 via email in 1~3 business day superseded
GB/T 7962.4-2010 Test methods of colourless optical glass—Part 4:Temperature coefficient of refractive index $150.00 immediately valid
GB/T 7962.5-1987 Colourless optical glass test methods--Middle stress birefringence $180.00 via email in 1~3 business day valid
GB/T 7962.5-2010 Test methods of colourless optical glass—Part 5:Stress birefringence $120.00 immediately valid
GB/T 7962.6-2010 Test methods of colourless optical glass—Part 6:Youngs modulus,shear modulus and Poissons ratio $110.00 immediately valid
GB/T 7962.7-1987 via email in business day to be superseded
GB/T 7962.7-2025 Test methods of colourless optical glass—Part 7: Extent of striae $270.00 via email in 1~3 business day to be valid
GB/T 7962.8-1987 Colourless optical glass test methods; Examination method for extent of bubble $180.00 via email in 1~3 business day superseded
GB/T 7962.8-2010 Test methods of colourless optical glass—Part 8:Bubble $110.00 immediately valid
GB/T 7962.9-1987 Colourless optical glass test methods; Coefficient of optical absorption $184.00 via email in 1~3 business day superseded
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