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API 5L ASTM A53 ASTM A106 SEAMLESS CARBON STEEL PIPE
5YRSTianjin Yuantai Derun Steel Pipe Manufacturing Group Co., Ltd.
Square rectangular pipe for fabricated building structure
5YRSTianjin Yuantai Derun Steel Pipe Manufacturing Group Co., Ltd.
SHENSHI Coal-Electric Exchanger Energy Saving Double Steel Power Plants
10YRSHangzhou Shenshi Energy Conservation Technology Co., Ltd.
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