Chiyambi Mu kalozera watsatanetsataneyu, tikuwunika ma geophone, momwe amagwiritsidwira ntchito, ukadaulo, ndi maubwino.Monga otsogola paukadaulo wa geophone, tadzipereka kukupatsirani chidziwitso chakuya pa chida cha zivomezi ichi....
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