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factory direct selling low price high quality hot rolled cold rolled C.S seamless steel tube gas water, US $ 582 - 698 / Ton, JIS, DIN, ASTM, JIS G3454-2007, JIS G3462-2004, JIS G3458-2005, DIN 17175, ASTM A106-2006, ASTM A213-2001, ASTM A53-2007, ASTM A210-1996, A53-A369, 10#-45#, Q195-Q345, A53(A,