If you install the upper drag strut incorrectly, it will hit the lower drag strut during retraction.
如果你不正确地安装上拖杆，它将在缩回过程中击中下拖杆
A.Nothing will happen during retraction if the upper drag strut is replaced correctly. B.If you install the upper drag strut by mistake, it will break the lower drag strut during extension. C.Wrong installation of the upper drag strut will cause the hitting of the lower drag strut during retraction.正确答案C
