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| 对接法兰; 平面法兰 | |||
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| 对接平面法兰凸缘 | |||
| 对接平面法兰 | |||
| 平面对接法兰; 对接〔平面〕法兰; 平法兰 | |||
| 平面凸缘; 对接凸缘 | |||
| Plain flange: 3 phrases in 1 subject |
| Technology | 3 |
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