System and method for encapsulating edges of a paper in digital printing systems. The circuit includes at least a first transistor and a second transistor which is coupled to both the first transistor and a voltage supply in a manner wherein the second transistor is adapted to turn the first transistor off in the event of an interruption in the voltage supply. The hinge press formed by connecting six hinge sleeve piston components through reinforcing plate or through hinge ears and pins is installed in the accommodation space enclosed by the outer frame, thus forming a cubic hinge press. The second metal lines are connected with a second metal layer disposed below the first metal lines on the metal layer, and the first metal lines are connected with the second metal layer disposed below the second metal lines on the first metal layer. A PCR format has immediate applications in medical diagnosis and gene testing. , T18 C; and whether a combination of S and T satisfies an inequality e.