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| общесоюзный стандарт ОСТ | |||
| государственный общесоюзный стандарт | |||
| общесоюзный стандарт | |||
| 全苏 标准: 21 phrases in 3 subjects |
| General | 11 |
| Oil / petroleum | 5 |
| Technology | 5 |
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