00431nam a22001097a 4500008004100000040005500041080002400096245013300120260004600253300001000299650001200309230616b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  a621.3.012(084) bL5  aGraphic symbols for electrical and electronics diagrams (including reference designation letters) c/ American National Standard  aUSA: bAmerican National Standard, c1975  a111p.  aScience