This widget is a field where users can indicate 
the name of the conduction file at the SYRTHES format.
Authors advise is rather to use the button located at the right, to choose 
the name of the conduction file in a list of files. It has also the advantage 
that if a conversion towards SYRTHES format 
is necessary, it will be then proposed automatically.
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 SYRTHES version   : VERSION_SYRTHES
 Name help file  : Fn_fluid1d_lne.html
 I. Rupp, C. Peniguel  -  may 2014
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