- STANDARD CODE

It is coded with digits and letters containing the drawing number and 5 separate pieces of information.

- ADDITIONS TO STANDARD CODE

In addition to the technical specifications contained in the standard codes, the required features are listed in the “ ADDITIONS TO STANDARD CODE". These features are given below. In this section only needed features are written. See examples.

- SPECIAL CASES

Additional features which are not fully defined with "STANDARD CODE” and ‘’ ADDITIONS TO STANDARD CODE’ are coded with special drawing number. This code is expressed with IN=Manufacturing number.