In accordance with the present invention, it has now been found that glycidyl epoxy resins containing substitution on the epoxide ring can be used with conventional epoxy curing agents and fluxing agents to produce underfill adhesives that are suitable for use with silver-based alloys. In one embodiment, the present invention relates to an arrangement of axial vanes 77 that are situated such that the rotation of the rotor 76 generates an increasing drag force, thereby extending the upper limit of the flow rate range. Bipolar RF energy is then applied between the two electrodes, or the probes are cryogenically cooled, thus ablating the tissue therebetween. The time difference between the arrival of the reflection signals associated with the parallel light beams on the one hand, and the time difference between the arrival of the reflection signals associated with one of the parallel light beams and the angled light beam on the other hand, are used to determine a characteristic value for the distance. Still another method includes interactively selecting corresponding key vertices on different objects to form a merging curve. The locking mechanism has a rotatable input about a defined axis and a rotary cam means for converting rotation of the input into linear movement of the clamping member in said axis to effect and release engagement of the clamping member with the elongate member.