摘自ASME Y14.5M-1994 % s( I: H* H3 b9 X' L6 }) ^1.3.22 Regardless of Feature Size (RFS):The term used to indicate that a geometric tolerance or datum reference applies ; H' ?5 Q7 _ Pat any increment of size of the feature within its size tolerance.& q) `0 B1 a8 B; F4 U$ S) O