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covering disc | |||
shrouding disc |
盖盘 : 26 phrases in 12 subjects |
Agriculture | 1 |
Animal husbandry | 1 |
Chemistry | 2 |
Drilling | 7 |
Electric machinery | 1 |
Electronics | 2 |
General | 1 |
Information technology | 1 |
Oil / petroleum | 2 |
Technology | 6 |
Telecommunications | 1 |
Textile industry | 1 |