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HOLDING STRUCTURE MADE OF HOT-ROLLED I-IRON HOLDING MEMBERS ESPECIALLY FOR REINFORCING FLOORS OF EXISTING BUILDINGS AS WELL AS GENERALLY APPLICABLE PROCESS FOR REINFORCING FLOORS
HOLDING STRUCTURE MADE OF HOT-ROLLED I-IRON HOLDING MEMBERS ESPECIALLY FOR REINFORCING FLOORS OF EXISTING BUILDINGS AS WELL AS GENERALLY APPLICABLE PROCESS FOR REINFORCING FLOORS