helicopter rotor head
常見(jiàn)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.
在直升機(jī)的闡述頭和尾槳變速箱都必須是一個(gè)非常高規(guī)格的設(shè)計(jì)使用最好的材料和需要頻繁和昂貴的維修。
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