Gradient - density polyurethane foam has smooth, high - density, tough and tensile external skin and low - density core.

梯度密度聚氨酯泡沫塑料具有高密度 、 结实光滑而坚韧的外表皮和 低密度 泡沫芯.

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Detached from the external skin , rotating louvers enable exclusion of direct sunlight and associated glare.

和外墙分离的旋转百叶窗能够抵挡直射的阳光和相关的炫光.

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