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TORICH GB/T12771 12Cr18Ni9 06Cr18Ni11Ti 304 316 Welded Stainless Steel Capillary Tube Standard GB/T12771, ASTM A554, A249, A269 and A270, A312 Matrial 201 ( Ni 1.2%), 202 (Ni 3.5%~4.5%), 301(Ni 5%), ...