39 機器設備發生震動與顫動(vibration and chatter)主要原因是以下那一項?
(A)高制震性(high damping)
(B)熱變形扭曲(thermal distortion)
(C)低剛性(low stiffness)
(D)熱膨脹(thermal expansion)
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統計: A(232), B(130), C(773), D(78), E(0) #2018641
統計: A(232), B(130), C(773), D(78), E(0) #2018641