Bututun ƙarfe masu laushi don fashewar man fetur
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Bututun Karfe Mara Sumul Don Fasa Mai, GB9948-2006, Bututun Sanon
Bututun ƙarfe marasa sumul don fashewar mai, kamar bututun hayaki, bututun musayar zafi da
bututun mai a cikin masana'antar mai da matatun mai. Ingancin ƙarfe mai ƙarfi na carbon shine 20g,
20mng da 25mng; Matakan ƙarfe na ƙarfe masu ƙarfe: 15mg, 20mg, 12crmog, 15CrMoG, 12Cr2MoG, 12CrMoVG, da sauransu
