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| 双车头列车; 双机车牵引的列车 | |||
| 双重赛; 同一对球队一天内的两场比赛; 双重赛同一队一天内在同一场地的两次比赛 | |||
| 连续两场比赛; 同一场地连赛两场 | |||
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| 双牵引车汽车列车 | |||
| 双头式列车; 双击冷镦机; 双木边梁; 双车头牵引列车; 复式大梁 | |||
| English thesaurus | |||
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| DH | |||
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double-header : 10 phrases in 5 subjects |
| Metallurgy | 4 |
| Nautical | 1 |
| Plastics | 2 |
| Technology | 2 |
| Textile industry | 1 |