Colourful Znplated with thick film passivated Cr(lll) on the surface of steel mounthing rail make it much anti-corroded and RoHs conformed.是什么意思_Colourful Znplated with thick film passivated Cr(lll) on the surface of steel mounthing rail make it much anti-corroded and RoHs conformed.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句