Cropping mechanism is a key component for variant frequency vibration cropping, and its excited frequency directly affects manufacturing quality and production efficiency.
变频振动下料机构是变频振动系统的重要执行部件，其激振频率直接影响制造质量和生产效率。
The Excited frequency of forced vibration diverge from the Natural frequency of the machine tool, and the machine tool can be put on the practical application.
机床受迫振动的激振频率避开了机床的固有频率，该机床可以投入实际应用。
It is posed that angular air-hammer self-excited vibration and half frequency wobble self-excited vibration are two reasons for resulting angular wobble self-excited vibration for gas film face seals.
提出造成气膜端面密封角向摆动自振的内在机理，既有半频摆动自振又有角向气锤自振。
It is posed that angular air-hammer self-excited vibration and half frequency wobble self-excited vibration are two reasons for resulting angular wobble self-excited vibration for gas film face seals.
提出造成气膜端面密封角向摆动自振的内在机理，既有半频摆动自振又有角向气锤自振。
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