English translation: hands on product/equipment demonstration/training
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Explanation: I think lefoque's answer is probably going to fit best in your context, but more succinctly, I find simply 'hand over' often fits, where it is a question of briefly training someone to use something --- like a hire car, fro example.
Hope this helps 1
Tony M France Local time: 09:00 Native speaker of: English PRO pts in pair: 14157