Quality mmesi obi ike nke Q235b galvanized ọkpọkọ Q235b galvanized ọkpọkọ bụ a nkịtị ụdị ígwè ọkpọkọ, tumadi ji ubi dị ka ewu, ígwè, chemical ụlọ ọrụ, metallurgy, wdg Ya ihe onwunwe bụ Q235B carbon structural ígwè, na galvanizing ọgwụgwọ nwere ike melite ya mgbochi. corrosio...
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