Repeat step 1, but this time make the rail rotor turn to the left (counterclockwise).
Repeat step 1, but this time make the rail rotor turn to the left (counterclockwise).
重覆执行步骤1，但以逆时针的方向至少执行一次360°自旋。
Repeat step 1, but this time make the rail rotor turn to the left (counterclockwise).
重覆执行步骤1，但以逆时针的方向至少执行一次360°自旋。