本系列產品是根據相關標準和結合公司現行設備情況、技術水平和近幾年用戶對產品結構需求的變化進行設計的。適用于相對封閉或人員集中的重要建筑和設施內通道照明、應急廣播、等?？蛻艨蓞⒄瘴夜竟嫉钠髽I標準進行選擇。具體型號有：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.