心轴
4.The spindle of a balance wheel in a clock or watch, especially such a spindle in a clock with vertical escapement.
5.A spindle or an axle used to secure or support material being machined or milled.
6.a dead axle on a carriage or wagon that has terminal spindles on which the wheel revolve.
8.the stationary part of a machine or power tool that supports and drives a revolving part (as a chuck or the spindle on a lathe).
9.As far as the electrical field strength selected is appropriate, the vibratory amplitude of milling machine arbor will decrease to 50%～80% as low as that in common milling.
10.Excessive mesial-axial inclination of the mandibular second molar or inadequate posterior arch length cause the mandibular second molar to become impacted against the distal contour of the first permanent molar.
