It is the first mass production helicopter in the world that was equipped with two turboprop engines with the free power turbine.
它是世界上第一种大量生产的装备有双涡轮螺旋桨引擎的直升机。
It is the first mass production helicopter in the world that was equipped with two turboprop engines with the free power turbine.
它是世界上第一种大量生产的装备有双涡轮螺旋桨引擎的直升机。
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