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| 接地保护线 | |||
| 地线保护线 | |||
| 安全线; 保护导线 | |||
| 保护线 | |||
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guard wire : 13 phrases in 6 subjects |
| Business | 2 |
| Drilling | 1 |
| Electronics | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Technology | 7 |
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