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| 探管仪; 管道定位器 | |||
| 钢管定位器 | |||
| 管位探测器; 埋管位置探测器; 地下管道探测仪 | |||
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pipe locator : 3 phrases in 2 subjects |
| Oil / petroleum | 1 |
| Technology | 2 |
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