The improved process according to the invention prepares samples for subsequent imaging by directing the FIB beam so that its incident angle is not parallel to the planar boundaries between the materials with different etch rates. The insulating housing has a top wall, two side walls, a bottom wall and a rear wall which are interconnected to form a box shape with an accommodating chamber formed thereamong. For example, in response to detecting a presence of a main server in the storage area network and that the corresponding sub-server has been integrated with the main server, a respective sub-server initiates execution of at least a portion of function calls associated with a respective service at the main server in lieu of executing the function calls locally at the respective sub-server. The fender assembly may also have at least one boss extending from the frame at least partially through the hollow enclosure, and at least one fastener configured to engage the at least one boss and press the upper and lower walls toward each other. The orientation of the first and second blades, the wearstrips, and the wearstrip cylinder minimize a gap defined between the two blades, throughout the range of movement. The valve body of the overflow valve is connected to a control element which, in dependence upon the flow rate of the cleaning liquid, displaces the valve body to a closed or an open position.