Sistemụ nchekwa nchekwa bụ ụdị dị iche iche nke sistemu njikwa ohere, nke a na-eji arụ ọrụ ụlọ, ụlọ ọrụ mmepụta ihe, ụlọ nkwakọba ihe, akụrụngwa ubi, pipeline na ụlọ ọrụ ndị ọzọ nwere ihe achọrọ ọrụ patrol.Ebumnuche nke iji usoro a bụ inyere onye nwe ya aka iji usoro a na-elekọta na jikwaa p ...
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