锌合金压铸成型、表面镀镍镀锡处理、防止射频干扰；遮蔽良好，安装简易，接头为75Ω，F型接头10×0.75牙纹及3/8 32牙。
　　Zinc alloy die casting shaping,surface nickel, tin-plating treatment,prevent from RF interference,sound shield,easy installation, join integral 75Ω, F type join 10×0.75 tooth veins and British system 3/8 32UUEF.
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