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Terms for subject Drilling containing dual valve | all forms | exact matches only | in specified order only
| English | Chinese |
| dual closed-in pressure valve | 双重关井阀 |
| dual valve BP float shoe | 双回压阀浮鞋 (dual valve back pressure float shoe) |
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| English | Chinese |
| dual closed-in pressure valve | 双重关井阀 |
| dual valve BP float shoe | 双回压阀浮鞋 (dual valve back pressure float shoe) |