Thaum lub Cuaj Hlis 2019, Sandvik tau tshaj tawm qhov tshiab RDX5 xyaum, ua raws li tus qauv tsim ntawm HLX5 xyaum, superior hauv kev ntseeg tau, uas yog hloov pauv rau HLX5 xyaum.Siv cov khoom me me thiab cov pob qij txha, qee qhov tau hloov kho tshiab, piv nrog HLX5 xyaum, RDX5 xyaum txhim kho ...