Translations:Extend FEM Module/7/en

As an example lets add a new constraint called which is related to the flow equation. So, FlowPressure will widely used as for this constraint. A new constraint requires at least the following new modules: These three files must be added to as well as. All inserted lines of code are indicated by a starting +.
 * (may be unnecessary)
 * (may be unnecessary)
 * (may be unnecessary)