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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| YD/T 4333-2023 |
Technical requirements for the operation of top-level domain name resolution system security extension protocol {译} 顶级域名解析系统安全扩展协议运行技术要求 |
China Telecommunication Industry
Standards Main level |
 English PDF |
| YD/T 3876-2021 |
New generic top-level domain name service on the Internet - Domain Name Trademark Protection Service (TMCH) Process and Interface Technical Requirements {译} 互联网新通用顶级域名服务 域名商标保护服务（TMCH）流程和接口技术要求 |
China Telecommunication Industry
Standards Main level |
English PDF |
| DL/T 790.31-2001 |
Distribution automation using distribution line carrier systems. Part 3: Mains signalling requirements. Section 1: Frequency bands and output levels 采用配电线载波的配电自动化 第3部分：配电线载波信号传输要求 第1篇：频带和输出电平 |
China Electricity & Power
Standards Main level |
English PDF |
| QB/T 2338-1997 |
(Main level machine with grind) 主根擂平机 |
China Light Industry
Standards Main level |
English PDF |
| YD/T 294-1982 |
Main technical requirement for 620KHz level oscillators |
China Telecommunication
Standards Main level |
English PDF |
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