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Alpha
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Beta, английский
Around the track personnel (attp), английский
Persons required to work on a railway where any aspect of the task they are performing is "on or near the track". that is within three (3) metres from the edge of the closest rail when measured horizontally and at any level above or below the rail when measured vertically, unless in a position of safety. attp excludes any rail safety worker who is classified as a safety critical worker.
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