Abstract: A base station antenna with dual-broadband and dual-polarization characteristics is presented in this letter. The proposed antenna contains four parts: a lower-band element, an upper-band ...

※适用于氧化锌避雷器(压敏电阻),金属陶瓷二、三电极放电管、真空避等过压防护元件直流参数的测量;※具有自检功能；※起始动作电压U1mA 0～1700V； 1、适用于氧化锌避雷器(压敏电阻),金属陶瓷二、三电极放电管、真空避等过压防护元件直流参数的测量。

(Reuters) -Bharti Airtel, India's second-largest mobile carrier by number of users, posted its sixth straight quarterly profit rise on Monday, as users upgraded to higher-margin 4G and 5G plans and on ...