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| 半月弯; 回转管; U-型管; U形管 | |||
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| U形管; 回转管 | |||
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| 鹅颈形弯头 | |||
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| U形肘管; U形管 | |||
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| U形弯头 | |||
| образное колено: 9 phrases in 3 subjects |
| Electronics | 3 |
| General | 4 |
| Technology | 2 |
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