00597cam a22001331  4500082002800000100002600028245008700054260003900141300005800180500012400238526003700362650001600399710004800415  a720.284bGRHcL-12, P-21 aGraham, Frank Duncan,10aAudels answers on blue print reading for mechanics and builders,cby F. D. Graham.  aNew York,bT. Audel & co.c[c1941]  a8 p. l., 352 p. incl. front., illus., diagrs.c17 cm.  aChapter 10, "A.I.E.E. standards: standard symbols for electrical equipment of buildings" (p. 167-170) has special t.-p.  a0b0c0d720_284000000000000_GRH 0aBlueprints.2 aAmerican Institute of Electrical Engineers.