This standard specifies the technical conditions, test methods and inspection rules for hot-rolled stationary blade blanks for ste

This standard specifies the technical conditions, test methods and inspection rules for die-forged moving blade blanks for steam t

This standard specifies the technical conditions, test methods and inspection rules for die-forged stationary blade blanks for ste

"YZMg" means die-cast magnesium alloy, and the element symbol and value after it indicate the main alloying elements and their con

This standard is a revised version of JB 3063-82 "Powder Metallurgy Friction Materials". This standard specifies the technical con

JB/T 3051-1999 This standard is equivalent to ISO 841:1974 "Nomenclature of coordinates and motion directions of numerically contr

JB/T 3047-1999 This standard is a revision of JB 3047-82 "Precision of tapping combination machine tools". During the revision, on

JB/T 3044-1999 This standard is a revision of JB 3044-82 "Precision of modular machine tool fixtures". During the revision, only e