It is mainly composed of a PZT plate acting as an oscillator and a curved backliner in order to make the system a state of multi-resonance.
它以通常的平板圆形压电晶片作为换能器振子，加上曲面背衬使整个系统达到多共振状态。
2
The flexible winter-proofing gloves feature that on the basis of existing gloves, a backliner and the finger liners are additionally used for resisting cold well.
一种防寒冷风又灵活的手套，它是在已有的防寒冷的手套里料中，增加了一个手套背、手指两侧里料的厚度。
3
Back then a SU-15 plane brought down a South Korean air liner which had accidentally encroached upon the territory of the state.