Translations:FEM ConstraintDisplacement/20/en

This code has the following syntax:
 * the prefix Variable specifies that the displacement is not a constant but a variable
 * the variable is the current time
 * the displacement values are returned as Real (floating point) values
 * MATC is a prefix for the Elmer solver indicating that the following code is a formula
 * tx is always the name of the variable in MATC formulas, no matter that tx in our case is actually t