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- Engineers' straightedges (metric units)
- standard by Standards Australia, 01/01/1971
- Publisher: AS
Establishes main design features, general dimensions, material, finishes, methods and marking of support, and accuracies for cast-iron, steel and stone straightedges. It provides for three grades of accuracy and covers the range of sizes from 250 mm to 5000 mm in cast-iron and from 250 mm to 2000 mm in steel and in stone.