000 00251nam a2200109Ia 4500
008 230401s9999 xx 000 0 eng d
100 _aRAMAMOORTI(M)
245 0 _aTHYRISISTRO AND THEIR APPLICATION
250 _a2
260 _bEWP
942 _2ddc
_cBTECH
999 _c4895
_d4895