Assertion: detonator | /r/HasProperty | provided in package
Facets:
value: on ten
type: TEMPORAL
value: to allow
type: PURPOSE
Source sentences:
text: Detonators are provided in packages on ten to allow more than one line to be protected if required, and also to cover a range of reasons stated in the Rule Book why you may need to lay some before you reach the 1 1/4 miles at which you would usually lay them - these include an approaching train, when you would lay three 'dets and then stand clear of the line and give a danger signal; reaching a means of communicating with the Signaller, or a signal box itself, when you would lay them in case a train approaches before you have passed your message; reaching a tunnel, when you lay three at either end as they are ineffective within the tunnel itself; reaching a junction, whereupon you must lay three after the lines converge, to cover both routes, and then prioritise which way to continue; or if you are recalled to your train, at which point you lay three before returning to the scene.'Dets are also be used to lay 'Assistance Protection'.