7 Agricultural machines, namely, weeding machines, harvesters, harrows, seeders; Automatic vending machines and mechanisms for coin-operated apparatus sold as a unit; Engines and motors for the generation of electricity; Incubators for eggs; Machine coupling and transmission components, except for land vehicles; Machine tools for motorcycle repair, rectification of motorcycle engines, wheel balancing, powdered materials, rock crushing, cutting and forming of materials; engine parts, namely, piston rings; Connecting rod kits for machines, motors and engines including connection rods, crankshaft pins, upper bearings and pushing washers