알고 계십니까?

in hive-132554 •  last year 

알고 계셨나요?

제트기로 만들어진 비행기의 발견?
1939년에 발견되었다.
발명품은 군사용이었습니다.
독일 발명가에 의해.

hive-132554
last year by

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