To aim at power plants and factories with the characteristics of heavy dust and bad environment, and common fixed phone not meeting the need of communication scheduling, our company developed KNZD - 04 - A loudspeaking waterproof telephone, which mai... - Update: 2011-04-16

To aim at power plants and factories with the characteristics of heavy dust and bad environment, and common fixed phone not meeting the need of communication scheduling, our company developed KNZD - 04 - A loudspeaking waterproof telephone, which mai... - Update: 2011-02-11

To aim at power plants and factories with the characteristics of heavy dust and bad environment, and common fixed phone not meeting the need of communication scheduling, our company developed KNZD - 04 - A loudspeaking waterproof telephone, which mai... - Update: 2011-02-11

To aim at power plants and factories with the characteristics of heavy dust and bad environment, and common fixed phone not meeting the need of communication scheduling, our company developed KNZD - 04 - A loudspeaking waterproof telephone, which mai... - Update: 2010-12-11