Title: Yu hang chang xiang
Description: Ben shu yi wen tu bing mao de xing shi, dui yu hang shi ye de wei lai yu fa zhan jin xing da dan zhan wang he ke xue yu ce. shu zhong zhu yao jie shao le tai kong zi yuan yu tai kong gong ye, tai kong nong ye he tai kong fa dian, kong jian zhan he tai kong ji di, wei lai de tai kong cheng, tai kong lv you he tai kong yi min, yu zhou kong jian tan ce, jian li yue qiu di he kai fa yue qiu zi yuan, tai kong wu qi he xing qiu da zhan, zhong guo kong jian zhan gou xiang deng.
Subjects: Astronautics, Popular works