main reducer的用法和樣例：
例句
- The forced vibration problems of a turboshaft engine, which is mounted directly on the main gear box, were investigated.
摘要渦軸發動機的一種常見的安裝方式是其主安裝節直接與主減速器相連，對這種安裝形式下渦軸發動機的受迫振動問題進行了研究。 - The fatigue fracture reason of the weld seam at the back supporting rod of the main reductor of an aircraft has been analyzed by fractography and metallographic test.
對某飛機主減速器后撐桿焊縫疲勞斷裂原因作了分析。
