It is powered by two jet-turbine engines which operate both the five-bladed main rotor and, through a gearbox and shafts, a pair of propellers on two short wings.

它由两个喷气涡轮引擎提供动力，以驱动五个叶片的主旋翼，以及通过齿轮箱和连轴驱动在两边短翼上的一对螺旋桨。

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Working on the main rotor bearing housing is a natural progression for Romax Technology, a company that has many years experience in gearbox design.

Romax科技有限公司是一家有多年齿轮箱设计经验的公司，进行与主轴轴承分析校验和主轴轴 承座有关的工作是其技术领域的一个自然拓展。

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It included the black box flight recorder, the fuselage with the engines and rotor gearbox attached, the separated rotor head with the main rotor blades still attached, and the separated tail.

BBC: Crash report urges safety checks