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GB/T 20035.2-2005/ISO 8489-2:1995
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Textile machinery and accessories-Cones for cross winding-
Part 2 : Dimensions, tolerances and designation of
cones with half angle 3030'
(ISO 8489-
GBT 20035.2-2005 纺织机械与附件 交叉卷绕用圆锥形筒管 第2部分:半锥角3°30′圆锥形筒管的尺寸、公差和标记.pdf