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[判断题]
正常情况下使用两点内径千分尺时,当测量下限为70(或150)mm的两点内径千分尺时,被测量面的曲率半径不得小于20(或60)mm,否则可能产生内径千分尺的测头球面边缘接触被测件,造成测量误差。()
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A.120.037-120.059,0.04-0.09
B.120.020-120.059,0.04-0.09
C.120.037-120.059,0.01-0.04
D.120.020-120.059,0.01-0.04