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【单选题】
奥氏体不锈钢在焊态下,焊接接头产生 Cr 23 C 6 的敏化温度范围是 。A.
400－800℃
B.
600－1000℃
C.
1000-1200℃
D.
大于1200℃
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A.
after
B.
also
C.
until
D.
another
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