早期调查显示主齿轮箱 Main Gear Box ; MGB
主动齿轮箱 drive gear carrier ; driving gear box
齿轮箱主动轴 gearbox main drive shaft
主变速箱齿轮 Gear ; The main gearbox gear
在试验台对主齿轮箱的样机试验应在A-设计评审签发前完成（见第10.7节）。
The prototype test of the main gearbox at the test bench shall be completed before issuance of the ADesign Assessment (see Section 10.7).
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。
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.
盘须安装在齿轮箱上——该齿轮箱与主传动装置相连。
The tucker discs are fitted to gear-boxes that are connected to the main drive.
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