NASA NTRS · 19660000145
Extendable mast used in one shot soil penetrometer
Abstract
Penetrometer to test soil characteristics has a piercing head with soil instrumentation equipment attached to an expandable mast actuated by compressed air. The penetrometer gives continuous measurements as the mast pushes the piercing head through the soil.
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Hotz, G. M., Howard, G. A.. 1966-04-01. Extendable mast used in one shot soil penetrometer. https://ntrs.nasa.gov/citations/19660000145
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