Preferred Metric Sizes for Round, Square, Rectangle and Hexagon Metal Products
圆形、方形、矩形和六边形金属制品的首选公制尺寸

1952-01-01

Preferred Metric Sizes for Flat, Round, Square, Rectangular and Hexagonal Metal Products
平面、圆形、方形、矩形和六角形金属制品的首选公制尺寸

2016-10-14

Preferred Metric Dimensions for Round, Square, Rectangular and Hexagonal Metal Products
圆形、方形、矩形和六角形金属制品的首选公制尺寸