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双钟形喷嘴具有位于第一级喷嘴和第二级喷嘴之间的拐点 （12）。
The dual-bell nozzle has an inflection point (12) between the first stage nozzle and the second stage nozzle.
youdao
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双钟形喷嘴具有位于第一级喷嘴和第二级喷嘴之间的拐点 （12）。
The dual-bell nozzle has an inflection point (12) between the first stage nozzle and the second stage nozzle.
youdao