JMA AVANTCODE User Manual page 48

And finally, Bases: is the width of the blade supporting the bitting on the key.
9.
Example of how to complete tables 3, 4 and 5 (Fig.34):
Flat key with 5 supports with different depths:
7.1 mm = 710 (hundredths of a millimeter)
6.6 mm = 660 (hundredths of a millimeter)
6.1 mm = 610 (hundredths of a millimeter)
4.6 mm = 460 (hundredths of a millimeter)
(NB: All values must be entered as hundredths of a millimeter)
Enter the data as follows:
EDIT FILES
Spaces:
--- ---- ---- ----
--- ---- ---- ----
EDIT FILES
Bases:
--- ---- ---- ----
--- ---- ---- ----
Spaces
5 .1
4 .2
6 .6
4 .6
Depth
Fig.34
Entry angle
4 .2
4 .2 4 .2
1 1 0
0 .7
7 .1
Base
Key width
8 .3
42