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Terms for subject Technology containing double plumbing of shaft | all forms | in specified order only
| English | Chinese |
| double plumbing of shaft | 竖井双垂线定向 |
| double plumbing of single shaft | 单竖井双重线对中 |
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| English | Chinese |
| double plumbing of shaft | 竖井双垂线定向 |
| double plumbing of single shaft | 单竖井双重线对中 |