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39 2002 442 10 Electrical Measurement Instrumentation Vol39 No442 Oct 2002 1 150040 2 150040 1 1 2 A D TM9334 B 10011390 2002 10000503 Classifing of the CMOS chip focus on Watthour meter and the theory of the CMOS chip focus on Watthour meter Guo Songlin1Lin haijun1zhang Liyong2 1harbin Research Institute of Electrical Instrumentationharbin 150040Chinag 2harbin University of Seience and Technologyharbin 150040China AbstractThe import CMOS chip which is yielded by companies inside and outside t......