Bututun ƙarfe marasa sumul don hakar kwal
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Bututun ƙarfe marasa sumul don haƙar kwal- GB/T 17396-2009
Ana amfani da bututun ƙarfe mara sumul don ma'adinan kwal galibi don ƙera bututu mara sumul don
injin hydraulic a ma'adinan kwal.