摘自ASME Y14.5M-1994 ( k& @! M7 N4 j: h5 }& {2 q1.3.22 Regardless of Feature Size (RFS):The term used to indicate that a geometric tolerance or datum reference applies ( Q1 l* O" q, X9 z1 d1 Q5 e+ fat any increment of size of the feature within its size tolerance. 6 s# q! m& m) g/ } ) J9 X' q/ a4 E, Q, J8 b: I5 N论坛里有中文版的解释http://www.3dportal.cn/discuz/viewthread.php?tid=119393&highlight=Y14.5M* d+ G) k3 X3 b$ S