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IEC 60335-1 2016 7.14 要求 marking 和警告语字体的深度 至少为0.25mm. 用什么仪器能测量凸出或凹入字体的深度? 7 ~" [$ R) r S2 ` - D; e4 N, M, I1 m3 \: X: h* I
Unless contrasting colours are used, moulded in, engraved, or stamped markings shall be- O2 {0 T! G( ?+ `* Y7 x
either raised above or have a depth below the surface of at least 0,25 mm.+ o2 r6 C2 m$ D( U