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combination door | |||
combinational gate | |||
composite door | |||
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combination door |
组合 门 : 18 phrases in 8 subjects |
Drilling | 1 |
Economy | 3 |
Explosives and Explosive Ordnance Disposal | 1 |
General | 2 |
Refrigeration | 1 |
Securities | 2 |
Technology | 7 |
United Nations | 1 |