https://www.proz.com/kudoz/chinese-to-english/mechanics-mech-engineering/6602314-%E8%B5%B7%E5%8D%87%E4%B8%8B-%E9%99%8D.html

起升下 降

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Question removed by: Rita Pang

Reason: Repeated question as a previous Kudoz question posted by the same user

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