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单选题
When you return the airplane to its usual condition, be sure to remove the pin from the release mechanism.
A
When you restore the airplane to its normal condition, make sure the pin is released from the release mechanism.
B
Ensure to remove the pin from the let-go mechanism after you return from the airplane to its common position.
C
When the airplane is in good condition, you must uninstall the pin of the release mechanism.
答案解析
正确答案：A
相关知识点：
恢复飞机原状需拔释放销
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