the shell (metal casing) in which a train of gears is sealed
gear-box的用法和樣例:
例句
用作名詞 (n.)
When designing a planet gear box, in the case of gear shifted, the power must be analyzed to make sure if there are unreasonable and inner circle power. 摘要行星變速箱設計過程中,在掛接不同擋位時,各擋功率流向是否合理,是否存在封閉功率流,是必須解決的問題。