The two type of agricultural wastes are:- Farm animal waste Chemical waste
The McCormick reaper, threshing machines, steam and coal powered engines, and gasoline powered tractors were invented.
There are "v" belts, "serpentine" belts and "timing" belts.
Timing Belt, and a serpantine belt
Leather is by far the most important material for apparel belts, making up nearly two-thirds of total shipments.