7 Mixing drums in the nature of concrete mixers for transit concrete mixing vehicles; Truck-mounted machines for the loading, manufacturing, mixing, and disbursement of ready-mix concrete; Truck-mounted machines for the transport of ready-mix concrete in the nature of concrete mixing drums; Replacement parts and accessories for concrete truck-mounted machines for the loading, manufacturing, mixing, transport, and disbursement of ready-mix concrete, namely, chutes, chute structural components, valves as machine components, valve structural machine components, oil coolers for engines, rollers for rolling concrete mixing drums, seals, pistons, fans for oil coolers in machine engines, drive chains for driving rotation of concrete mixing drums, water pump structural components for motors and engines, hydraulic pump structural components, and drive cam shafts being parts of machines