A product is provided for forming separable interlocking napkin bands. A rotationally symmetrical pattern such as a concentric pattern and a radial pattern can be drawn in the drawing object by irradiating the drawing object with the electron beam during rotation of the turntable. The intermediary transmits the request to a cache server, the request maintaining original IP addresses and identifying a MAC address of the cache server as the destination MAC address. Also, the UE combines channel estimates calculated using pilot signals received form the cells and compensates the combined data signal using the combined channel estimate. The flow-inverting device allows the blood flow within the filtering unit to be kept unchanged even following an inverted circulation in the patient-side artery and vein branches controlled by the blood pump.