Mawu oyambira oyatsira (ⅳ)

11. Tungsten (W) : Tungsten ali ndi malo okwera kwambiri komanso gawo lalikulu, ndikupangitsa kukhala chinthu chothandiza cha zitsulo zamtengo wapatali. Amasenjete ndi kaboni amapangira cangsten cangbide, yomwe imakhala yolimba komanso kuvala kukana. Kuonjezera ziphuphu ku chida kumatha kusintha kuuma kofiyira ndikulimbana ndi kutentha, ndipo kungagwiritsidwe ntchito ngati zida zodulira ndikutha kumwalira.

12. NB) : Niobium ingakonze kukula kwa tirigu, kuchepetsa kuchita zinthu zotsekemera komanso kupsinjika kwa chitsulo, kusintha mphamvu, koma kuchepera. Kuwonjezera Niobium kupita ku zitsulo wamba kumatha kusintha kwake ku malo okhala mlengalenga ndi hydrogen, nayitrogeni, ndi ammonia kuvunda kwambiri. Niobium ikhoza kusintha magwiridwe antchito. Kuphatikiza Niobium to Austetitic Chitsulo chosapanga dzimbiri chimatha kupewa kupindika.

13. Cobatt (CO) : Cobat ndi chitsulo chosowa komanso chamtengo wapatali, chogwiritsidwa ntchito nthawi zambiri m'matumba apadera ndi ma entros, monga zitsulo zotenthetsera kutentha ndi zida.

14. Mkuwa (CU) : Copper imatha kusintha mphamvu ndi kulimba mtima, makamaka kukhazikika kwa mlengalenga. Choyipa ndichakuti ndizosavuta kutulutsa bwinja motentha pakuyenda bwino, ndipo ma pulasitiki amachepetsedwa kwambiri pomwe zokolola zamkuwa zimapitilira 0,5%. Zolemba zamkuwa zikakhala zosakwana 0,50%, palibe chothandiza pakudya.