Make sure that you complete the procedure before you tow the airplane back to its initial position.
A在将飞机恢复至初始状态前，确保已完成该步骤。
B确保在完成该步骤前，先将飞机置于初始状态。
C将飞机拖回初始位置前，应确保已完成该步骤。
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