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Meaning of permissive working | Babel Free

Noun CEFR B2

Definitions

A system allowing more than one train at a time to be on the same line in a block section, a signal section, or a dead-end platform line.

UK, uncountable

CEFR level

B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

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