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| 不同类型或尺寸的接头间的过度接头; 配合接头 | |||
| 转换【向】接头 | |||
| 过渡配合接头; 过渡锁接头 | |||
| 过渡接头; 转换接头 | |||
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crossover sub : 1 phrase in 1 subject |
| Oil / petroleum | 1 |
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