... , Angola, France and so onFeatures1) Easily assembly,surface even,without gap when concatenated.2) High intensity,corrode-resisting,aging-resisting,can ... of finished panels. When install the tongue into the groove, no gap is allowed , and the surface should be even as one ... of poor quality.3) Bowing the panelWhen bowing the panel , no break should occur and you can feel the elasticity. Clear ...