water jet propeller
喷水推进器
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Then the mechanism analysis of the planetary gear train propulsion that is the main part of the water-jet propeller is carried out.
然后，对推进器的主要部分——行星轮系推进装置进行机构分析。
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It was overhauled last summer, when its original, water-jet propulsion engines were replaced with two inboard propeller engines.
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