IEC 60417A : 1974被替代
GRAPHICAL SYMBOLS FOR USE ON EQUIPMENT - INDEX, SURVEY AND COMPILATION OF THE SINGLE SHEETS - FIRST SUPPLEMENT
出版：International Electrotechnical Committee
专家解读视频
Automatic frequency control, fourteen symbols for ships' radar equipment; video, disc record player; four symbols for band pass and band stop filters.
BS 6217(1981) : 1981 - Identical
NEN 10417 : 1995 - Identical
DIN 40101-1 : 1991 - Identical
DIN 40100-22 : 84 DRAFT 89 - Corresponds
BS 6217(1981) : 1981 - Identical
DIN 30603 : 1985 - Identical
DIN 32520-4 : 1986 - Similar to
UNE 20557-1 : 1985 - Identical
