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【单选题】
在GB/T4161-2007中,规定了四种试样用于测定金属材料平面应变断裂KIC,以下哪一种试样不在该国标的规定中?
A.
标准三点弯曲试样
B.
紧凑拉伸试样
C.
C形拉伸试样
D.
条形拉伸试样
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