Assembly for forming a box, comprising a bottom wall, two longitudinal walls, two end walls and an upper wall, wherein the walls are each plate-shaped and provided with coupling parts directly cooperating with each other and situated in the plane of the plate in question. The retractable seal moves between an extended position for sealing between the first door and the second door, and a retracted position spaced from one of the first door and the second door to allow independent pivotable movement of either the first door or the second door. The system may provide the user with a playlist of available videos for each channel. Subsequently, a quotient of the \u201con\u201d phase times and the \u201coff\u201d phase times is increased to deposit a second portion of the coating, which has a different composition than the first portion of the coating. The projections are designed so that a pressurized liquid located in the annulus will substantially flow into the cylinder’s working space. The memory attribute register is preferably a memory mapped control register writable by the central processing unit.