1993LS/T 3501.6-1993 General technical conditions for grain and oil processing machinery Welding parts
1970LS 38-1982 General technical conditions for grain and oil processing machinery Welding parts
LS 38-1982 General technical conditions for grain and oil processing machinery Welding parts was changed to LS/T 3501.6-1993 General technical conditions for grain and oil processing machinery Welding parts.