该产品应由5股纱线组成，每股纱线有720根连续长丝，每英寸（25.4mm）最多4圈。这种纱线通常用于编织各种形状和结构的石墨布和织物，用于制造烧蚀应用中使用的部件，但用途不限于此类应用。

The product shall consist of 5-ply yarn having 720 continuous filaments per ply and a maximum of 4 turns per inch (25.4 mm).This yarn has been used typically for weaving graphite cloth and fabric of various shapes and constructions for fabrication of components used in ablation applications, but usage is not limited to such applications.