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| Chinese National Standard Category: Building glass |
| English Title: | Sheet glass-Determination of transmittancy of visible rays |
| Chinese Title: | 平板玻璃可见光总透过率测定方法 |
| Standard No.: | GB 2680-1981 |
| Category No.: | Q33 |
| Issued by: | |
| Issued on: | |
| Implemented on: | 1982-1-1 |
| Status: | superseded |
| Superseded by: | GB/T 2680-1994 Determination of light transmittance, solar direct transmittance, total solar energy transmittance and ultraviolet transmittance for glass in building and related glazing factors |
| Superseded on: | 1994-10-1 |
| Abolished on: | |
| Superseding: | |
| Word Count: | 500 words |
| Similar Standards: | T/ZBH 005-2018 JC 292-1981(1996) T/ZBH 006-2018 JC 433-1991(1996) GB/T 29551-2023 GB 11614-2022 GB/T 41314-2022 GB/T 39806-2021 GB/T 39135-2020 GB/T 38586-2020 GB/T 38344-2019 GB/T 38214-2019 GB/T 37825-2019 GB/T 36404-2018 GB/T 36405-2018 GB/T 36406-2018 GB/T 36267-2018 GB/T 36268-2018 GB/T 36269-2018 GB/T 36400-2018 |
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