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双回线 | |||
双箕状纹 | |||
2 周套跳 | |||
双列蛇形管圈 | |||
双线圈; 双重组织 | |||
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双环; 双回路 |
double loop : 32 phrases in 12 subjects |
Air defense | 1 |
Athletics | 1 |
Communications | 1 |
Electronics | 5 |
Figure skating | 9 |
Labor organization | 1 |
Metallurgy | 1 |
Space | 2 |
Surgery | 1 |
Technology | 4 |
Telecommunications | 1 |
Textile industry | 5 |