精选优质文档-倾情为你奉上To Whom It May Concern:I take great pleasure in recommending Longgang Wu, one of my favorite students, for admission into your distinguished graduate program in Machinery Manufacturing. I have known Mr. Wu 5 years since his freshman year at Harbin Engineering University. At that time, he took the course “Advanced Manufacturing Technology”, which I taught mainly for junior students Majoring in Mechanical Engineering. To my surprise, I found he was among the few students in