A dual-mode crawler unit for traversing a generally tubular target, the unit comprising means for effecting a hand-over-hand action along the target and also means for effecting a driven action along the target, the unit comprising two or more traversing units, the units being directly connected to each other by one or more linear actuators.
IN OR RELATING TO CRAWLERS
2016-03-03
Patent
Elektronische Ressource
Englisch
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