GB/T 18778.1-2002 Geometrical product specifications(GPS)--Surface texture:Profile method;Surfaces having stratified functional properties--Part 1: Filtering and general measurement conditions*, 2002-07-15 Update
GB/T 18778.2-2003 Geometrical product specifications(GPS) Surface texture: Profile method: Surface having stratified functional properties Part 2: Height characterization using the linear material ratio curve*, 2003-04-15 Update
GB/T 18778.3-2006 Geometrical Product Specifications(GPS). Surface texture. Profile method. Surface having stratified functional properties. Part 3: Height characterization using the material probability curve*, 2006-07-19 Update
GB/T 18780.1-2002 Geometrical product specifications(GPS)--Geometrical features--Part 1: General terms and definitions*, 2002-07-15 Update