2017年1月，天畅环保送检的65系列玻纤上悬窗通过耐火一小时实验 。标志着我公司在耐火窗系列产品继内平开之后，上悬窗也通过耐火完整性测试，天畅环保的耐火产品研发又迈一大步！

In January 2017, the 65 series glass fiber overhung Windows submitted by Tianchang Environmental Protection passed the fire resistance test for one hour. It marks that our company's refractory window series products have passed the fire integrity test after the internal flat opening, and Tianchang Environmental protection's refractory product development has taken a big step!