A printing apparatus according to one aspect of this invention includes an assigning unit configured to assign the original images of a plurality of pages to the obverse surfaces and reverse surfaces of a plurality of sheets in the page order. The removable lid is attached to the stopper body and a resilient diaphragm plug is compressed between the lid and the stopper body. The masonry coupling system further includes a key that interfaces the masonry veneer and interlocks with an anchor channel mounted on a structure. The belt and motor-driven pulley are mounted on the rack. The insulin is an acylated insulin and may be mixed with a further insulin analogue such as the rapid acting insulin Asp B28 human insulin. One embodiment is adapted to be put in a low-resistance state by applying a first threshold voltage and in a high-resistance state by applying a second threshold voltage, wherein reading out of the data content from the memory cell is performed by applying a voltage to the memory cell in the range of the first or second threshold voltage or a higher voltage.