GB / T 5310-2017 20g, 20mng, 25mng, etc.
Assme a CVI gr. B, Gr. C
Assme Sa CCX gr. A1, gr. C
ASME SA CCXIII T11, T12, T22, etc.
ASME SA CCCXXXV P11, P12, P22, etc.
Seamless Steel tubulis ad altus-pressura boilers
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