| |||
| discontinuous signal; intermittent signal | |||
|
signal intermittent : 4 phrases in 3 subjects |
| Automated equipment | 2 |
| Rail transport | 1 |
| Transport | 1 |
| |||
| discontinuous signal; intermittent signal | |||
|
signal intermittent : 4 phrases in 3 subjects |
| Automated equipment | 2 |
| Rail transport | 1 |
| Transport | 1 |