main landing gear的用法和樣例：
例句
- Braking is provided by four brake assemblies, one mounted on each main gear wheel.
剎車(chē)系統由四個(gè)剎車(chē)組件組成，一個(gè)安裝在每個(gè)主起落架艙。 - The stalky main landing gear struts retract forward into the engine nacelles.The nose gear retracts forward into a well ahead of the cockpit.
主起落架向前收入發(fā)動(dòng)機艙，前起落架向后收入座艙前的艙室。
