The influences of the heat transfer condition outside an oscillatory tube on the optimum exciting frequency and the characteristics of the oscillatory flow inside the tube have been experimentally investigated.

The excitation frequency to the drilling rod could be changed by the rotary speed adjusted at the drilling rig working period.

This paper discusses the excited magnetic frequency of an inouctive synchronous apparatus under working conditions within the aplitude range,the feeding rate of the working platform, the resolving rate of displacement measurement, the measurement accuracy, and theirrelationship.

Effect of excitation frequency on microcrystalline silicon materials prepared by VHF-PECVD;