helicopter rotor head
常见例句
- In a helicopter the articulated head and tail rotor gearbox are required to be a very high specification design using the best materials and requiring frequent and costly maintenance.
在直陞機的闡述頭和尾槳變速箱都必須是一個非常高槼格的設計使用最好的材料和需要頻繁和昂貴的維脩。
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