In the theoretical research of the dielectric eigenvalue problem, stress is emphasized on the longitudinalcharacteristic modes in two-dimensionally periodic dielectric.
在介质本征值问题的理论研究中，重点研究二维周期介质纵向导波问题。
2
This paper describes the characteristic of continuous electroplate with longitudinal transmission. They are many advantage over conventional electroplate.
本文介绍了纵向垂直式连续电镀生产线的特性，它比常规垂直式电镀生产线有更多的优点。
3
The natural longitudinal or torsional vibration of a wedge-shaped shaft is studied with perturbation method. The vibration mode function and the frequency characteristic equation are derived.