main spar meaning in English
首柱木
主翼梁
Examples
- Structural modifications focus on increasing the minimum life of the wing main spar ( originally set at 800 hours ) have carried through several proposed progressive stages of modification with the intention of reducing fatigue problems and providing a life extension of up to 1 , 250 hours for a complete refurbishment with a newly manufactured main spar
机体结构上的修改着重于延长主翼梁的最低寿命（ 800小时） ，以进行多次渐进式阶段的改造方法来达到减少疲劳和延长寿命至1250小时的目标。