An electrical equipment casing includes a circuit board on which many electrical parts are mounted and a heat sink to which the circuit board is fixed. The invention also provides therapeutic methods as well as processes and intermediates useful for preparing compounds of Formula. At least a portion of each multipole ion guide mounted in a linear assembly resides in a vacuum region with higher background pressure. The microbubbles may also be coated or filled with medication, with ultrasonic shock waves activating the coating or causing mini explosions to release the medicine. The rheometer reaches steady-state sample temperature more quickly, and the steady-state temperature reached is closer to the actual desired sample temperature than with prior art rheometers, due to the much greater thermal contact between the sample cup and the control jacket.