Kis guglizással egész jó dolgokat sikerült találni a Japán érdekességről:

 

"Hello stevenh,
I’m not sure weather you will follow this thread after so many years. I was brought to your lines by the very same research – which wheel notation is correct for JFR DE10/DE11/DE15.
First you should go back an read over UIC notation again. The small “o” indicates individual drive for each wheelset, thus a diesel hydraulic engine with one prime mover cannot carry any ‘o’, we can only discuss how wheelsets are supported in the main frame. C’ would be three wheelsets in one bogie, AAA would be three individual wheelsets directly attached to the main frame. What I see on the picture appears what is mostly considered one bogie with three driven wheelsets, thus C’.
AAA most likely comes from the idea that each wheelset is supported by an individual frame or bogie within the main bogie. This is what you find with quite a few six-wheel bogies and ist usually simplified to C’ (or Co’ with individual driving engines) – most correctly we would have to call this something like this (AAA)’ or even (A’AA’)’ with ‘ indicating the subframe.
I hope this helps any further confusion… Just get back to me via email if it still puzzles you, the rest of the world will likely stay with C’B’ or just leave this question to the japanese hobbyists.
Regars
/Dennis"

 

Azthámoztam ki lényegként, hogy egy fő kerethez 3 egyedi keret csatlakozik ami magába foglalja a kereket és a tengelyhajtóművet is. Csuklós forgóvázként hivatkoznak rá. (https://modelrail.otenko.com/japanese-trains/de10-locomotive-co-bo-or-aaa-b).

 

Több kép:

 

http://traincglib.web.fc2.com/traindir/jnr_etc/dt132_001.html

 

 

https://me38a.hatenablog.com/entry/2018/11/18/115322

 

http://www2s.biglobe.ne.jp/~hidepon/5inch/de10/001/001.html

 

https://minkara.carview.co.jp/userid/346105/car/259247/3950013/2/photo.aspx#title