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040 _aMAIN
041 _aEnglish
082 _a620
_bGRA
100 _aGraff, Heinz
245 _aTechnical fundamentals
_belectrical installation
260 _aCalcutta
_bAsia publishing
300 _a180p.
650 _aEngineering
650 _aTechinical aspects
942 _cBK
999 _c39937
_d39937