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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| YD/T 4280-2023 |
5G mobile communication network N4 (core network control plane and user plane) interface technical requirements and test methods {译} 5G移动通信网 N4（核心网控制面与用户面）接口技术要求和测试方法 |
China Telecommunication Industry
Standards N4 |
 English PDF |
| JC/T 2349-2015 |
Si3N4 ceramic insulation components for polycrystalline silicon production 多晶硅生产用氮化硅陶瓷绝缘体 |
China Building Materials
Standards N4 |
English PDF |
| HG 21590-1995 |
(Reflective glass level gauge (PN4. 0)) 反射式玻璃板液面计(PN4.0) |
China Chemical Industry
Standards N4 |
English PDF |
| SJ/T 10490-1994 |
Detail specification for electromechanical switches for use in electronic equipment lever (toggle) switches type KN4 电子设备用机电开关详细规范 ｋｎ４型钮子开关 |
China Electronics
Standards N4 |
English PDF |
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