GB/T 20035.4-2005
纺织机械与附件 交叉卷绕用圆锥形筒管 第4部分;半锥角4°20′染色用圆锥彤筒管的尺寸、公差和标记
Textile machinery and accessories.Cones for cross winding.Part 4:Dimensions,tolerances and designation of cones with half angle 4°20′for winding for dyeing purposes
GBT20035.4-2005, GB20035.4-2005