1996GB/T 6119.1-1996 Side and face milling cutter--Tapes and dimensions
1985GB/T 1118-1985 Side and face milling cutters with double alternate helix
0000 GB 1118-1973
GB/T 1118-1985 Side and face milling cutters with double alternate helix was changed to GB/T 6119.1-1996 Side and face milling cutter--Tapes and dimensions.