A rake for harvesting downed corn, including a mounting plate, a camshaft comprising a series of cams, and a plurality of support bars extending between the mounting plate and the camshaft. The discrete particles include a plurality of abrasive grits and a polymeric material that includes a reaction product of components including an epoxy-functional material, at least one of a cyclic anhydride or a diacid derived therefrom, and optionally a polyfunctional acrylate. The pressure regulator is for adjusting a pressure between the cover and the carding cylinder. A coordinated drive system provides for both upwardly and downwardly breaking or jointed orientations of the two sections in various inclined and tilted positions. A plurality of emitters may be disposed in an array around the patient’s Adam’s apple. Each band includes a right edge side and a left edge side, each edge having disposed thereon a set of spaced teeth, each tooth having a slot disposed therein and a tab disposed between adjacent teeth, the tab configured to engage the slot of an opposing tooth.