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The seamless steel tubes made by co***ny are based on the DIN EN (DIN2391) StandardThe hot rolled seamless tube produced by Shanghai Baosteel Co***ny is used as transfer bar of our co***ny. The finished product is made with the exclusive process of cold drawing and/or cold rolling of our co***ny. The steel tube is featured with high precision and high brightness. Because of using the exclusively nonoxidizable process of bright heat treatment, the inner and outer walls have high cleanness without oxidized su |
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