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| 环形止水闸门 | |||
| 环形止水阀门; 环封闸门; 附环闸门; 附环直滚闸门 | |||
| 附环直滚阀 | |||
| English thesaurus | |||
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| RING FOLLOWER; RING-SEAL,PARADOX-GATE | |||
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