A cord lock for a venetian type blind or pleated shade has a flange extending from each of the front wall and the rear wall of the cord lock housing. The method may also include delivering tissue into the bag, sealing the bag, and inflating the bag to create an artificial pneumoperitoneum that extends the abdomen and provides additional working and viewing space. A shelf mounting area at the back of the base provides for a series of coin display shelves to be stacked thereon. The film layer covers the halftone layer disposed at the third region, to make the transmittance of the third region lower than that of the second region. Associated methods of removing fluids and replacing fluids from a plurality of reservoirs includes coupling the fluid transfer system to the reservoirs.