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
PWT（白腊）:Pewter
SB（铜砂光）:Satin brass
SC（砂铬）:Stain chrome plated