The "exact term used there" is presumably your question, unless you are looking for the Catalan.

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Barcelona bonded warehouse area. Technical data. - Roof surface: 3150 m2 (97.2 m x 32.4 m). - Roof thickness: 0.36 m. ESTUDIO DE INGENIERIA ...
www.mc2.es/05.../mc-138y180_fi_cubierta_logistico_barcelona...

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Note added at 7 mins (2010-02-24 17:20:20 GMT)
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and the answer to the second part of your question, which should have been posted separately is "Free Trade Zone"


CLASA, GPA, CIMALSA and the Barcelona Free Trade Zone Consortium each have 22% stakes in the group, while CILSA has a 12% one. The aims of this group are to ...
www.clasanet.com/clasaing/news/news/num2_3.htm - En caché -
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... corporate headquarters to the Logistical Park of the Barcelona Free Trade Zone, in a new building of 11000 m2 designed by the architect Ricardo Bofill. ...
www.abertis.com/fr/noticies.php?noticia_id=1125 - En caché -
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The Parc Logístic is located in land belonging to the Zona Franca de Barcelona (Barcelona Free-Trade Zone) and faces the Ronda Litoral orbital, ...
www.abertis.com/en/sp/noticies.php?ln=0.

With regards to the second part (tax-free/duty-free zone), this is how we always used to refer to it when I worked in a multinational in conjunction with Barcelona airport from where a great deal of cargo was taken straight to the "Zona Franca".