 |
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| 贯通掘井井巷掘进中,采用一个或两个工作面按预定方向与预定井巷和硐室接通的作业 | |||
| heading through: 6 phrases in 6 subjects |
| Compressors | 1 |
| Electronics | 1 |
| General | 1 |
| Plastics | 1 |
| Technology | 1 |
| Wood processing | 1 |
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| |||
| 贯通掘井井巷掘进中,采用一个或两个工作面按预定方向与预定井巷和硐室接通的作业 | |||
| heading through: 6 phrases in 6 subjects |
| Compressors | 1 |
| Electronics | 1 |
| General | 1 |
| Plastics | 1 |
| Technology | 1 |
| Wood processing | 1 |