摆式仪测定路面摩擦系数时,摆在路面上滑动长度为()
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摆式仪测定路面摩擦系数时,摆在路面上滑动长度为()
A.130mm±1mm
B.128mm±1mm
C.126mm±1mm
D.127mm±1mm
参考答案:
摆式仪测定路面摩擦系数时,摆在路面上滑动长度为()
A.130mm±1mm
B.128mm±1mm
C.126mm±1mm
D.127mm±1mm
参考答案: