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| |||
| 缩小管接 | |||
| 缩径联轴器接管 | |||
| 异径接箍 | |||
| 异径管接头 | |||
| 异径连接〈塑料管线〉 | |||
| 异径内承插管 | |||
| 缩径管接头; 异径管节; 缩小接管; 缩口接头; 缩径联轴节; 变径管节 | |||
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reducing coupling : 3 phrases in 2 subjects |
| Oil / petroleum | 1 |
| Technology | 2 |
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