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| screw thread pipe | |||
| metal bellows | |||
| corrugated metal pipe | |||
| metallic bellows | |||
| metal corrugated | |||
| metallic corrugate pipe | |||
| 金属 波纹 管: 8 phrases in 5 subjects |
| Automobiles | 1 |
| Bridge construction | 2 |
| Hydroelectric power stations | 1 |
| Nautical | 1 |
| Technology | 3 |
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