Bearings are installed in the shock strut to provide sliding surfaces and hold the cylinders concentric with each other.In the above sentence,"hold the cylinders concentric with each other"means"保持内外筒彼此同心".
A.1
正确答案是A
Bearings are installed in the shock strut to provide sliding surfaces and hold the cylinders concentric with each other.In the above sentence,"hold the cylinders concentric with each other"means"保持内外筒彼此同心".
A.1
正确答案是A