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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 41423-2022 |
Calculation of long-term luminous flux and radiation flux maintenance rate of LED packaging {译} LED封装 长期光通量和辐射通量维持率的推算 |
China National Standards Calculation long term |
 English PDF |
| GB/T 15902-2017 |
Conveyor belts—Determination of elastic and permanent elongation and calculation of elastic modulus 输送带 弹性伸长率和永久伸长率的测定及弹性模量的计算 |
China National Standards Calculation long term |
English PDF |
| GB/T 15902-2009 |
Conveyor belts - Determination of elastic and permanent elongation and calculation of elastic modulus 输送带 弹性伸长率和永久伸长率的测定及弹性模量的计算 |
China National Standards Calculation long term |
English PDF |
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