-YUANTAI:CHINESE TOP 500 MANUFACTURING ENTERPRISE- Tianjin Yuantai Derun Pipe Manufacturing Group co, Ltd., te etabli an mas 2002, * Pi gwo manifakti ki espesyalize nan ERW kare & rektangilè tib/tiyo, tiyo estrikti seksyon kre, tiyo galvanised ak tiyo espiral soude. ..
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