A.R.M. Bogdanski is a tool, which can be used for training all the aspects of armwrestling. Here are just some ideas about the possible angles and positions. The rest is up to your imagination, training goals and favourite exercises.
Top-Roll
Hook
Shoulder-Roll
Back Pressure

Biceps
Side Pressure

Lat Pressure

Wrist Curl
Pronation
Front Wrist
Supination