Applied Mechanics and Graphic Statics
The forces which meet at one point and have their lines of action in different planes are called

Non-coplanar non-current forces
Coplanar non-concurrent forces
Intersecting forces
Non-coplanar concurrent forces

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Applied Mechanics and Graphic Statics
The characteristic of a couple is:

All listed here
Algebraic sum of moments of forces, constituting a couple, about any point, is same
Algebraic sum of forces, constituting a couple is zero
A couple can be never the balanced by a single force

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