Sechikamu chakaoma-chinodzivirira chechisimba chemidziyo yemaindasitiri (akadai sebhora mamirimita), liners anowanzogadzirwa kubva kune yakakwirira-simba esimbi kana yeRussia yakajairwa carbon-manganese simbi mahwendefa. Semuenzaniso, 13γ1 с simbi yakarova yeRussia yakajairwa carbon-manganmes yakagadziriswa, ine mwero mbozha Izvi zvinhu zvinogona kutsungirira kwenguva refu-mhedzisiro kubva mukukuya kwenhau uye zvigadzirwa, kusangana neyekumusoro kupfeka zvinodikanwa zvekudzivirira kwemidziyo yemugodhi
