最后，提出了因自旋交换碰撞和自旋销毁碰撞引起的极化原子的自旋弛豫。
Finally, spin relaxation of polarized atom due to spin-exchange collisions and spin-destruction collisions is put forward.
天线能被固定在重力的中心而没有任何碰撞，在极化变化期间。
Antenna can be fixed in the center of gravity without any collision with the AM 9144 during polarisation change.
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