| 摘要 |
A method, for use in connection with installing a cable into a conduit (4) having a first end and a second end (12), of detecting whether air is flowing from the first end to the second end, the method including the steps of:-providing a movement sensor (10) within or proximate to the conduit;-providing an air flow (14) into the conduit from the first end; and-detecting that the air is flowing to the second end when the air flow disrupt the movement sensor.
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