五金里面的表面处理pss是什么意思

Finishes 表面处理说明: AB（青古铜）: Antique brass plated AC（红古铜）: Antique copper plated AN（古铜镍/哑镍）: Antique nickel plated BB（光亮铜）: Bright brass BC（黑铬）: Black-chrome lacquered BS（铜原色）: Brass self color BP（镀铜）: Brass plated CP（镀铬）: Chrome plated DB（哑铜）: Dull brass plated KG（金）: K-golden LG（灰白漆）: Light grey lacquered PB（仿金）: Polished brass plated PLGP（珍珠金）: Pearl golden plated PLNP（珍珠镍）: Pearl nickel plated P&L（铜精光）: Polished and lacquered PSS（不锈钢精光）: Polished stainless steel PVD（锆）: PVD