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底部反射层
| 套管
| 底部反射层 | |
| gen. | нижняя часть отражателя |
| 套管 | |
| el.mach. | проходной изолятор |
| electric. | втулка |
| oil | обсадная колонна |
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| нижняя часть отражателя | |||
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| нижняя часть отражателя | |||
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底部反射层 : 4 phrases in 2 subjects |
| Electronics | 3 |
| General | 1 |
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