I-welded semi-rigid centralizers zizixhobo ezibalulekileyo kushishino lwepetroleum, kwaye umgangatho wemveliso ubalulekile ekuqinisekiseni impumelelo yokomba kunye nokusebenza kwesamente.Ngokwesiko, i-centralizers yenziwe ngentsimbi ephezulu, ebiza kakhulu.Nangona kunjalo, ngokusebenzisa i-uniq ...
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