00418nam a2200145 a 450000500170000000800410001704100080005808200120006610000180007824500510009626400450014730000270019250000190021965000340023820260717091427.0260717s1990    ii            000 0 eng d  aeng04a621.3171 aSharma, M. C.10aRelays and their applications /cSharma, M. C. 1aNew Delhi :bB.P.B. Publications,c1990.  a165 p. : ill. ; 21 cm.  aIncludes index 4aRelays and Their Applications