-Aisea e asiasi ai i YUANTAI DERUN- Tianjin Yuantai Derun Pipe Manufacturing Group Co., Ltd., na faavaeina ia Mati 2002, * O le kamupani sili ona tele e faʻapitoa i le ERW sikuea & faʻataʻitaʻi faʻamau / paipa, paipa fausaga vaega gaogao, paipa uʻamea ma paipa uelo silo i Saina.. .
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