A new and improved film wrapping or packaging machine has incorporated therein a new and improved mechanism or system for implementing the downward folding of outwardly projecting edge or tab portions of slip sheets interposed between successive tiers, levels, or layers of articles or goods forming a palletized load. Thus, determining a delay value at the CMOS buffer circuit allows a phase difference between the A clock driver and B clock driver to be determined. The rotary engine further comprises a combustion region having an upstream portion and is adapted to cause a combustion reaction of an oxygen-fuel mixture in the combustion region in a manner to form combustion reaction products which comprise at least a part of thrust matter to be discharged through the discharge ports of the first and second jet assemblies. The assumption could be that the video frame includes a left portion and a right portion where each portion contains respective stereoscopic image perspectives. The method comprises supplying a first RF signal to a first electrode disposed in a processing chamber, and supplying a second RF signal to the first electrode, wherein an interaction between the first and second RF signals is used to control at least one characteristic of a plasma formed in the processing chamber. The third quarter-wave metallic strip may superimpose the second quarter-wave metallic strip along the vertical space, so as to sample the output signal of the second quarter-wave metallic strip.