主题：黑鹰直升机在空陆航最初的飞行岁月 -- 潘涌

Rome is not built in one day. What support Black hawk is advanced techology and mature experience. China is indeed lack of accumulating technology as well as experience. It happened before, probably is still so now. Moreover, China didn't pay attention to either training or keeping a competent team in a certain field, which would cost quite a lot of money. Westerns won't export you experiences and technologies, except for merchandices.