Ama-centralizers ashiselwe kancane angamathuluzi abalulekile embonini ye-petroleum, futhi ikhwalithi yomkhiqizo ibalulekile ekuqinisekiseni impumelelo yokusebenza kokumba kanye nokufaka usimende.Ngokwesiko, ama-centralizers enziwe ngensimbi yekhwalithi ephezulu, ebiza kakhulu.Nokho, ngokusebenzisa i-uniq...
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