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| 瓣阀; 旋启式逆止阀; 摆动式止回阀; 旋启止回阀; 旋转式止回活门阀 | |||
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поворотный обратный клапан : 6 phrases in 4 subjects |
| Automated equipment | 1 |
| Electronics | 1 |
| General | 2 |
| Technology | 2 |
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