PTU: What exactly is it?

[Volodymyr Chumachenko]

Not exclusively technical skills.
For example, Odessa PTU #1 was one of the most popular in 
the Soviet Union: its gradustes (cooks, stewards etc.) 
worked as crew members on the ships of the commercial fleet.

Volodymyr Chumachenko,
Univ. of Illinois (Urbana-Champaign)

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