GB/T 20257.1-2007
AbolishedCartographic symbols for national fundamental scale maps - Part 1: Specifications for cartographic symbols 1:500 1:1000& 1:2000 topographic maps
国家基本比例尺地图图式 第1部分:1:500 1:1000 1:2000地形图图式
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GB/T 16902.1-1997
Rules for the presentation of graphical symbols--Graphical symbols for use on equipment--Part 1: Greation of graphical symbols
GB/T 1252-1989
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GB/T 15566-1995
Graphical signs--Principles and requirements for the application
GB/T 15565-1995
Graphical symbol--Terms
GB/T 4728.12-1996
Graphical symbols for electrical diagrams--Part 12:Binary logic elements