I am unable to locate the phrase "sonda antipatinaje" on the Web, except for your ref.

I have found "sistema antipatinaje" and ASR "regulación antipatinaje"...

Most non-English sites translate this as "anti-skating", but all the UK sites have "anti-slip"..

Sadly, I have erased all my references, somehow or other!

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Note added at 19 mins (2008-01-01 15:56:04 GMT)
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Here we are!

Patents in Class 303/15
... system for a self-powered rail vehicle provided with an anti-slip device .... device, locomotive brake pipe controller connected to a locomotive. ...
www.freepatentsonline.com/CCL-303-15.html - 76k - Cached - Similar pages
Patents in Class 303/7
A brake controller for a locomotive includes a train brake pipe, a locomotive ... system for a self-powered rail vehicle provided with an anti-slip device ...
www.freepatentsonline.com/CCL-303-7.html - 76k - Cached - Similar pages
[ More results from www.freepatentsonline.com ]
China Star completes rigorous test programme: China's first
... axle disc foundation brake rig, and an electronic-pneumatic anti-slip device ... He was chief engineer of Zhuzhou Electric Locomotive and chief designer ...
www.encyclopedia.com/doc/1G1-138810933.html - 40k - Cached - Similar pages
[PDF]
The flexible RACO modular system
File Format: PDF/Adobe Acrobat
Due to the fact that the locomotive is not only furnished with a wheel slide protection device for the braking process. but also with an anti-slip device ...
www.racointernational.com/PDF_DS/raco_pm.pdf - Similar pages