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| 安全规范 | |||
| 安全规程 | |||
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| 安全技术条件规程 | |||
| 安全规范 | |||
| 安全规程; 安全技术条件 | |||
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safety specifications : 2 phrases in 2 subjects |
| Oil / petroleum | 1 |
| Technology | 1 |
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