The present invention provides a hermetic or open compressor for hydrocarbon refrigerant having high reliability. The effective ISO of the camera is reduced by scaling the summed image, thus reducing image noise and improving long exposure quality. The net absorbs the impact of a ball in conjunction with the flaps which trap a ball impacting a tensile zone of the net. The first child node can be displayed in a second position of the display area, the second position being adjacent the first position. The control circuitry instructs an address counter, during an erase operation, to increment row addresses of the rows of the memory array by two rows when the bit is at the first level or four rows when the bit is at the second level. The media path passes across the aperture outside the shielded enclosure.