It tests that the linearity of XB rocket sled track has reached the first-class level in the world.

测量结果表明，XB滑轨轨道的直线度具有世界一流水平。

youdao

It tests that the linearity of XB rocket sled track has reached the first-class level in the world.

测量结果表明，XB滑轨轨道的直线度具有世界一流水平。

youdao