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| security rating | |||
| security level | |||
| safety level | |||
| safety class | |||
| safe class | |||
| safety class (IEC WTGS Class) | |||
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| safety level | |||
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| safety class | |||
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安全等级 : 22 phrases in 13 subjects |
| Automobiles | 1 |
| Aviation | 3 |
| Bridge construction | 1 |
| China | 1 |
| Computer networks | 1 |
| Cryptography | 3 |
| Engineering geology | 1 |
| Information technology | 3 |
| Nautical | 1 |
| Navigation | 1 |
| Nuclear and fusion power | 2 |
| Space | 1 |
| Technology | 3 |
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