NR/L3/SIG/11235/G130/EL1023 ISSUE 1
Signal Maintenance Testing Handbook: Replace an Electro-mechanical banner repeating signal with an LED type, using a Howells Interface Unit
active, Most Current
| Organization: | NR |
| Publication Date: | 4 September 2021 |
| Status: | active |
| Page Count: | 2 |
Document History
NR/L3/SIG/11235/G130/EL1023 ISSUE 1
September 4, 2021
Signal Maintenance Testing Handbook: Replace an Electro-mechanical banner repeating signal with an LED type, using a Howells Interface Unit
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