单项选择题
某AGT型案秤的标尺最大值是0.5kg,计量杠杆的支力距为300mm,支重距为60mm,游铊的质量是156.25g,标尺全长是()
A.192mm
B.255mm
C.250mm
D.300mm
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单项选择题
A.192mm
B.255mm
C.250mm
D.300mm
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