先進技術引進的很多，隻是不公布。

來源: 石假裝於 2014-05-23 00:21:33 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.