The reliability is improved at a low cost even in a virtualized server environment. Two or more frequencies to which the coil is tuned are adjusted so as to be between resonance frequencies of series resonant circuits constituting the RF coil. An axis of the conical shape coincides with a rotation axis of the jet engine. The electric motor operates hydraulic pumps used to advance a drill string and downhole tool through the earth and operate various machine functions. The user can then select rules that appear to be most relevant, and further analytics can be applied to the selected rules to obtain further information about the information provided by these rules. A passage or a recess is provided in the brake pad carrier of the brake pad, wherein a badge is inserted.