Addition.

来源: Happyyl 于 2013-11-06 09:04:27 [] [旧帖] [给我悄悄话] 本文已被阅读： 次 (111 bytes)
回答: Good improvement 由 Happyyl 于 2013-11-06 08:55:05
The prepeller design based on concepth of mixed flow fan may further improve energy efficiency and redue noise.

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• Mixed flow design could further improve streamline of the submar -Happyyl- ♂ 给 Happyyl 发送悄悄话 (0 bytes) () 11/06/2013 postreply 09:09:37

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