A gusseted bag made of a flexible weldable material has a closed bottom end that at the inside top end is provided with a reclosable device. The systems and methods determine one or more groups of text rows that are placed into a class based on the structures of the text rows, such as the positions of the one or more alignments of the one or more character blocks in each text row. The control device is electrically connected with strain gauges so as to display the values of torques that the tool outputs from the function end. The idler cooperates with the driven wheel to engage a sheet. The density of the tin-copper compound barrier film is greater than that of copper.