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tend to suffer less deformation than percussion cores. However, the core-cutting process takes longer and jams are common in the ancillary equipment which retrieves the sample from the drill bit and stores it within the tool body.
* Coring by hand can be done with a variety of instruments, such as a Russian Peat Corer, a handheld piston corer or simply a hollow tube. The advantages of coring by hand are low costs and quick operation, but a handheld corer will only reach limited depths, ranging from a few decimeters in clay soils to a few

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