A New Atomic Clock

摘要：

The U.S.Department of Commerce”s National Institute of Standards and Technology (NIST) has officially launched a new atomic clock,called NIST-F2,to serve as a new U.S.civilian time and frequency standard,along with the current NIST-F1 (A)s____.

在线出版日期：2014-07-30（万方平台首次上网日期，不代表论文的发表时间）

页码：31