DIN 49075-2:1989 安裝在不同于 φ45 mm 孔徑的不帶規定插入件的安裝盒開關裝置、電氣插座及其附件用蓋板.第2部分:主要尺寸
Cover plates for use with switches, socket-outlets and other accessories intended to be mounted into mounting boxes with openings other than of diameter 45 mm without inserts; main dimensions