Ohta T,Kitamura A,Ogata H. LH2 turbopump test with hydrostatic bearing. AIAA 99-2195.是什么意思_Ohta T,Kitamura A,Ogata H. LH2 turbopump test with hydrostatic bearing. AIAA 99-2195.在线翻译_英语_读音_用法_例句