| http://www.w3.org/ns/prov#value | - In one embodiment, the controlling mechanism is a thread and a threaded collar, whereby rotating the collar relative to the handle of the tamp causes the tamping mechanism to expand, contract, or otherwise be deployed, such as by advancing or retracting the sheath around the tamping mechanism, advancing a rod or similar device to limit the range of motion of the tamp, or the like.
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