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изготовление чего-л. в форме кольца (например презервативов; annulation(动)) |
环纹 : 34 phrases in 10 subjects |
Amphibians and reptiles | 1 |
Antennas and waveguides | 1 |
Aviation | 1 |
Electronics | 2 |
Forestry | 2 |
General | 13 |
Mathematics | 3 |
Polymers | 1 |
Technology | 7 |
Textile industry | 3 |