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### Constraints

The second column represents the so-called constraints, which determine the orientation and size of geometric objects.
The corresponding CAD command is the REMEMBER-command. Possible constraints are, for example, parallelism, perpendicular, tangentiality (all orientated constraints) and distance or radius (constraints determining the size). Each of these constraints defines a relation between two or more objects, but none of them is distinguished. These constraints are considered with manipulations and thus remain in the construction.