Railway fixed equipment . halogen free cables for signalling and warning alarm used in underground railway networks 铁路固定设备.地铁内网络内报警器和灯光信号用的无卤物电缆
The thesis also analyzes the characteristics of dmx5i2 , and puts forward that dmx512 can be used as the protocol of lighting control system . thus , the incompatibility between console and dimmer , which is produced by different manufactures , will be solved . a kind of pci device is designed 本论文的主要工作： ( 1 )研究dmx512数字式灯光信号协议，分析其特点，提出把它作为灯光控制系统的协议，避免了不同厂家生产的调光台和调光器之间的兼容性问题，并对dmx512协议提出自己的看法。
