Jzh Jess niile n'otu nnukwu ike ike nchekwa nchekwa

Jzh Jess niile na otu nnukwu ike nchekwa sistemụ nchekwa sistemụ nrụọrụ na-akwụghị ụgwọ.

Njikwa usoro abụọ: Mains inters na mmepụta ihe, na-arụ ọrụ na-eme ka ọ bụrụ ọnọdụ nchekwa nke ọma, na-arụ ọrụ nke ọma. Nchedo polarity na ihe ndị ọzọ.