Article
飛行機的進步 - The development of the airplane
Subject matters: 新知 - new knowledge,
Language level: Baihua
Keywords: science, military, Germany, airplane,
Persons:
谷青 Gu qing (Author)
Article
飛行機的進步 - The development of the airplane
Keywords: science, military, Germany, airplane,
Persons:
谷青 Gu qing (Author)