000 00269nam a2200133Ia 4500
100 _aWilliam/ B.W
942 _cBK
654 _apower
245 _aPower Electronics
260 _bELBS
_aHong Kong
_c1989
082 _a621.3
_bWIL
300 _a337
546 _aENGLISH
999 _c25017
_d25017