额外联合高速船的长期材料包括柴油发动机、水力发动机和减速齿轮。
Long lead-time material for the additional vessels will include diesel engines, water jets and reduction gears.
这种发动机在风扇与涡轮间安装了一个齿轮减速器。
Unlike a conventional turbofan, it USES a gearbox rather than a shaft between the fan and the turbine.
这种发动机在风扇与涡轮间安装了一个齿轮减速器。
Unlike a conventional turbofan, it USES a gearbox rather than a shaft between the fan and the turbine.
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