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| 过渡变径轴套套筒 | |||
| 异径衬套; 内外丝套筒 | |||
| 异径补心 | |||
| 异径套管 | |||
| 缩孔垫圈; 缩径轴套; 过渡套管; 过渡衬套; 变径衬套 | |||
| reducing bushing: 5 phrases in 3 subjects |
| Hydroelectric power stations | 1 |
| Oil / petroleum | 2 |
| Technology | 2 |
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