工频

Can develop filters /duplexers or other functional modules independently.

能独立开发滤波器双工器及其他射频前端模块。

According to the requirements of 3 dB-coupler in adjacent-channel duplexers and the basic principles of 3 dB-coupler, a narrow band 3 dB-coupler is analyzed which can applied to digital TV field.

根据数字邻频双工器中对三分贝耦合器的要求和三分贝耦合器的基本原理，对应用于数字电视领域的一款窄带三分贝耦合器进行了分析。

Ltd, which was founded in 2002, designs and manufactures a series of passive devices, such as filters, duplexers, couplings and multi-frequency band mixers in communication frequency bands of DCS, GSM, CDMA and 3G.

南京震宇通信技术有限公司成立于2002年，创业以来，公司先后在DCS、GSM、CDMA、3G通信频段内设计生产了一系列滤波器、双工器、耦合器、多频合路器等无源器件。

Objectie:To obsere the changes of fundamental frequency and formants of owel in cochlear implant pre-lingual children of different age and to proide the basis and direction for post-operatie rehabilitation.

目的观察不同年龄的语前聋人工耳蜗置入的儿童在置入人工耳蜗后，其元音基频和共振峰的变化规律，为术后语言康复工作提供指导和依据。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。