Steel abụghị naanị maka nnyefe mmiri na powdered solids, okpomọkụ mgbanwe, mmepụta nke n'ibu akụkụ na containers, ọ bụ echekwa ígwè. Ihe owuwu ụlọ nke nwere eriri n'ichepụta ọkpọkọ, ogidi na nkwado igwe, nwere ike belata ibu ma chekwaa 20 ruo 40% metal, ma nwee ike ...
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