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此系列产品硬度大于HRC56.
此材质符合的: GB/T 8263-1999, AS 2027/
Ni-Cr1-550, AS 2027/Ni-Cr2-500, AS 2027/Ni-Cr4-500,
AS 2027/Ni-Cr4-600, AS 2027/Ni-Cr4-630, ASTM A
532 1-A,B,C,D, ASTM A 532 2-A,B,C,D,E, ASTM A 532 3-A.