A compression device includes a frame mountable to a mammography unit that includes a window disposed within an x-ray field of the mammography unit when the frame is mounted to the mammography unit, and a radiolucent compressible member connectable to the frame across the window for providing a compression surface within the x-ray field. The techniques allow certain high speed clocks to be activated with predefined waveforms during a capture period of a logic test, based on a clock control signal. The switching fabric is partitionable into a plurality of switch planes such that each switch plane can be assigned to transfer data associated with like data ports of the interface units. The coil terminal and control terminals, which are connected to the printed circuit board having a control circuit for controlling current supply to the coil, are provided on different wall surfaces of a resin part. The enhancers are low molecular weight alcohols andor ethers that assist the action of blowing agents comprising a hydrohalocarbon compound. The method including having a high initial force of the contact roll of less than 10 kg, reducing the force to about 25-60% of the initial force during the first 30% of winding time, then holding the force substantially constant until the final 30% of the winding time when the force is reduced to about a final force of 10-35% of the initial force.