Hesoolver 2-6-4 [upd] -

Products like the SAFE® Capper/Decapper use "8/6/4" to describe the number of channels for processing sample tubes.

"Push them, Silas! Give me everything the 2-6-4 has got!" Aris roared, gripping the captain's chair. Hesoolver 2-6-4

This arrangement is rare but known as the (after the Adriatic Sea). It was used mainly in Europe (e.g., Italy, Germany, Poland) for fast passenger and freight locomotives. Products like the SAFE® Capper/Decapper use "8/6/4" to