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| IEVref: | 821-04-11 | | ID: |
| Language: | en | | Status: Obsolete |
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| Term: | trap points
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| Synonym1: | safety points
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| Synonym2: | side protection switch (US)
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| Definition: | points provided in a line to prevent unauthorised movements from that line on to another line, and which are interlocked to provide flank protection
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| Publication date: | 1998-04 |
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