A high performance and cost effective method of RF-digital hybrid mode power amplifier systems with high linearity and high efficiency for multi-frequency band wideband communication system applications is disclosed. The tool driving mechanism is moved rectilinearly in the axial direction of the tool bit by swinging movement of the swinging member thereby rectilinearly driving the tool bit. The conveying belt includes an insulating layer formed at one side contacting the recording medium. Thus obtained powders include a matrix phase having R2Fe14B crystal structure, a R-rich grain boundary phase containing rare earth fluoride, and other phases, in which the matrix phase has an average grain size of 1\u201320 \u03bcm, and the powders have an average size of 50\u2013500 \u03bcm with superior magnetic characteristics of max\u226720 MGOe and iHc\u22675 kOe. A vector field map is obtained for tracking of breast ducts of the ductal trees along the direction of the 1st eigenvector v1 and the ductal tree is displayed on a voxel by voxel basis in parametric images using color coding and vector pointing. The utensil includes a body, a first support assembly operable and effective for supporting the body in a vertically upright position during use, and a second support assembly operable and effective for supporting the cover of a cooking vessel in a desired orientation relative to the cooking vessel.