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Standard
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BS 1538:1949
Specification. Intrinsically-safe transformers primarily for bell-signalling circuits
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Technical characteristics
| Publisher | British Standards Institution (BSI) |
| Publication Date | 02/09/1949 |
| Page Count | 0 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
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Previous versions
31/12/1956
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09/02/1949
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