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Attention, during all the trips a carer/guide is present, both on the go-devils and bicycles.
The ends of said body are adapted to the inner cross-section of the conduit in such a way that the outside of the go-devil tightly rests on the inside of the conduit over the entire circumference thereof.
At present neither go-devil can sample formation fluids, but it should be feasible to develop this capability.
Certain tools can work as a go-devil because their diameter is very close to 3.75 in.
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