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Low temperature transport measurements on superconducting film - normal metalwire - superconducting film (SNS) junctions fabricated on the basis of 6 nmthick superconducting polycrystalline PtSi films are reported. The structureswith the normal metal wires of two different lengths L=1.5 $\mu$m and L=6$\mu$mand the same widths W=0.3$\mu$m are studied. Zero bias resistance dip relatedto pair current proximity effect is observed for all junctions whereas thesubharmonic energy gap structure originating from phase coherent multipleAndreev reflections have occurs only in the SNS junctions with short wires.Comment: ReVTex, 4 pages, 4 eps figures include

Proximity effects and Andreev reflection in a mesoscopic SNS junction with perfect NS interfaces