Standard Code | Standard Title | Standard Class | Order |
---|---|---|---|
GB/T 18329.4-2021 |
Plain bearings—Metallic multilayer plain bearings—Part 4:Non-destructive ultrasonic transmission testing of bond of thickness greater than or equal to 0.3 mm 滑动轴承 多层金属滑动轴承 第4部分: 合金厚度≥0.3mm的结合质量超声穿透无损检测 |
China National Standards 4:Non |
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GB/T 18794.4-2003 |
Information technology--Open Systems Interconnection--Security frameworks for open systems--Part 4:Non-repudiation framework 信息技术 开放系统互连 开放系统安全框架 第4部分:抗抵赖框架 |
China National Standards 4:Non |
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