The source of the data used for this report is the taf database maintained by the u.s. patent and trademark office .
本报告使用的这些数据，源于美国专利商标局属下的taf数据库。
They grew especially in the form of repurchase agreements and , later , new types of credits such as term-auction credits - through the term auction facility ( taf ) - starting in december 2007 .
Two of their most useful weapons are the federal reserve 's term auction facility ( taf ) and swap lines providing foreign central banks with dollars .
