Technological backrest TNK Office Chair
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https://www.wurkon.com/product/3 
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High 3D model for close up renderings with turbo-smooth
in the modifier stack, in case you want to increase the details
or turn the modifier off for making numerous copies in
your scene
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The archive contains :
-3ds Max 2015 Vray version
-3ds Max 2015 Corona version
-Fbx Vray version
-Fbx Corona version