LI Chao,WANG Ying,CHEN Chao,HU Hong-yu,ZHANG Bing
1.Equipment Management & Safety Engineering College, Air Force Engineering University, Xi’an 710051,China;2.Air Force Military Representative Office in CAC,Chengdu 610092,China;3.Air Force Military Representative Office in 162 Factory,Anshun 561018,Guizhou,ChinaN945