in news:web.5c3eb3bfb5cce384765e06870@news.povray.org Bald Eagle wrote:

> It's been too long since I've fiddled with one, and was wondering if
> anyone had any experience with them.
> 

I had a few but lost them somehowe. Most where for special tasks like 
calculation roll diameters from core diameter and paper thickness and 
calculating fermentation of beer,

ingo

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