The product adopted standard of ASTM A 249/A249M,the technical parameters and properties are not only meet the standard requirement, but also some index superior than the standard.

• 产品采用美国ASTM A2 4 9/ A2 4 9M标准生产 ,主要技术参数及使用性能不但达到了标准要求 ,而且有的指标还优于标准。