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单选题
664. The manufacturer may establish procedures to provide feedback on unairworthy conditions that were discovered when complying
A
The manufacturer may offer procedures to provide feedback on unairworthy conditions that were discovered to be complied.
B
In order to discover any unairworthy conditions when compiling, the manufacturer shall comply with certain procedures.
C
The manufacturer may set up procedures to feedback unairworthy conditions discovered when complying.
答案解析
正确答案：C
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