A、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px">淬火与低温回火</span>
B、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px">淬火与中温回火<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px"> </span></span>
C、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px; TEXT-DECORATION: none">淬火与高温回火</span><span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px"> </span>
D、<span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: black">表面淬火与回火</span>
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