E, re ka fana ka sampole ea mahala, empa litšenyehelo tsa ho romella li tla ba akhaonteng ea hau.
E, re etsa libotlolo tsa khalase joalo ka litlhoko tsa hau, hape, re ka fana ka kalafo e fapaneng: joalo ka ho hatisa skrineng, ho ngola mabitso a chesang le tse ling.
Bakeng sa lihlahisoa tsa setoko, ke matsatsi a ka bang 5-15.
Haeba re se na thepa e rekiloeng, ho ka nka matsatsi a ka bang 15-30 ho romela thepa ho latela thepa ea rona.
Re na le boikarabelo bo felletseng ba ho netefatsa boleng, re tla leka ka hohle ho tšehetsa khoebo ea hau.
Re ka fana ka thepa ea khalase ea Mofuta oa 1. II. II ho latela litlhoko tsa hau.
Mabapi le thepa ea khalase ea mofuta oa I re na le Khalase ea Sechaena ea Sebaka.
(Khalase ea Katoloso ea 50 le Katoloso ea 70) le thepa ea machabeng (Corning & Schott).
Dikahare tsa dimethara tse boima le Arsenic di ka tlase haholo ho boleng bo lekanyeditsweng ba USP le EP.
