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| 固定联轴节; 法兰联轴节 | |||
| 螺旋套管式连接管; 螺旋帽; 螺旋套筒式连接管 | |||
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свёртная муфта : 5 phrases in 2 subjects |
| Oil processing plants | 4 |
| Technology | 1 |
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