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White dimensionally stable plastic
The precision divisions are numerated both ways
Dimension markings in (cm) and (m) for easier working
With 2 coloured flutings
School version
Scales: 1:10 1:20 1:25
1:33 1:50 1:75
1:100 1:200 1:250
1:500 1:750 - 191765
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