NASA NTRS · 19650000189
Extendible column can be stowed on drum
Abstract
Column formed from a series of segments held together by an internal spring or cable can be coiled on a drum or extended into a rigid structure. This storable coil is useful in boring for soil samples and supporting electrical and optical sensors.
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Holtz, G. M., Howard, E. A.. 1965-06-01. Extendible column can be stowed on drum. https://ntrs.nasa.gov/citations/19650000189
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