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The input command lines of a defined block are included
in an optical system by one of the commands:
2 B(LOCK) I(NCLUDE) <block name> ;
B(LOCK) I(NCLUDE) <block name> R(EVERSE) ;
In the second case, the command lines of the block are included in reverse
order. This is useful for the design of mirror symmetric systems. Note
that the use of blocks does not save computation time.
KPII
1999-10-20