回弹法检测时,碳化深度每个点应测量3次,每次测量碳化深度可以精确到( ),3次测量结果取平均值精确到( )。( )
A.0.25mm 0.5mm B.0.5mm 0.5mm C.0.25mm 0.25mm D.0.5mm 1.0mm正确答案A
回弹法检测时,碳化深度每个点应测量3次,每次测量碳化深度可以精确到( ),3次测量结果取平均值精确到( )。( )
A.0.25mm 0.5mm B.0.5mm 0.5mm C.0.25mm 0.25mm D.0.5mm 1.0mm正确答案A