单项选择题
杆体纵裂纹长度大于()或深度大于()。交叉支杆报废。
A.50mm;0.6mm
B.60mm;0.6mm
C.100mm;0.6mm
D.0.5mm;0.6mm
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单项选择题
A.50mm;0.6mm
B.60mm;0.6mm
C.100mm;0.6mm
D.0.5mm;0.6mm
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