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DIN 2391-2 ST52 Honing Steel Pipe /DIN 2391-2 ST52 Honed Steel Pipe, US $ 1 - 1.9 / Metric Ton, ASTM, DIN, GB, ANSI A210-1996, DIN 2391, DIN EN 10025, DIN EN 10216-1-2004, DIN EN 10217-1-2005, DIN EN 10305, GB/T 3639-2000, 10#-45#, 16mn, Q195-Q345, STB35-STB42, 10#, 20#, 45#, 16mn, Q215, Q235, Q345,