本系列产品是根据相关标准和结合公司现行设备情况、技术水平和近几年用户对产品结构需求的变化进行设计的。适用于相对封闭或人员集中的重要建筑和设施内通道照明、应急广播、等。客户可参照我公司公布的企业标准进行选择。具体型号有：BBTRZ、BBTRQ、NG-A(BTLY)、BTTRZ、BTTVZ、BTTWY、BTTWV、BTTE、RTTW等。

　　This series of products are designed according to relevant standards and combined with the company's current equipment conditions, technical level and changes in product structure needs of users in recent years. It is suitable for passage lighting, emergency broadcasting, etc. in important buildings and facilities that are relatively closed or where people are concentrated. Customers can choose according to the corporate standards published by our company. Specific models are: BBTRZ, BBTRQ, NG-A (BTLY), BTTRZ, BTTVZ, BTTWY, BTTWV, BTTE, RTTW, etc.