BS 623:1940
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Specification for colours for signal glasses for railway purposes
23-07-2013
20-05-1940
Colorimetric and photometric requirements, limits for colour quality (illustrated by a curve), methods of test.
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