propeller-jet engine螺旋桨喷气式发动机 mounting of propeller by hydraulic jack螺旋桨液压无键装配 ..
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jet-propeller engine 喷气螺旋桨发动机
Innovation in aviation has centered on the development of the jet engine for civil use, first in a turbo propeller form and later as a pure jet.
航空业的革新集中于民用航空喷气式发动机的研发，首先是涡轮螺旋桨发动机，后来是纯粹的喷气机。
It serves to replace or complement the propeller, wheel, jet engine, solid fuel, etc, in the area of transportation and use in space travel.
它在运输和太空旅行应用领域中，用来取代或补充推进器、轮盘、喷气发动机、固体燃料等。
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