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1800mm × 30mm × 15000mm Large Diameter Thick Wall LSAW Steel Pipe for Steel Structure Columns and Load-Bearing Members, Find Details and Price about Structural Steel Pipe LSAW Steel Pipe from 1800mm × 30mm × 15000mm Large Diameter Thick Wall LSAW Steel Pipe for Steel Structure Columns and Load-Bearing Members - Qingdao Sangao Metal Structure Co., Ltd.