Dump Truck (Tipper): It's a complete unit - the chassis, cargo box and hydraulic lifting mechanism are built together. The cargo box can tilt and dump automatically via hydraulics, emptying sand, gravel, ore or coal in just a few seconds. It's typically used for mining, construction sites, earthmoving and short-distance bulk transport, usually covering just a few to tens of kilometers. The common configuration is 8×4, with a payload of 31–40 tons, but because it carries its own cargo box and lifting system, it's relatively heavier.
Tractor (Semi-trailer truck): It's only a cab with a fifth wheel - it doesn't carry cargo by itself. It must be coupled to a semi-trailer (box, flatbed, tanker, low-loader, etc.) to form a complete truck. Its advantage is higher overall payload (usually over 40 tons) and greater hauling efficiency, mainly used for long-haul logistics, container transport, hazardous goods and oversized cargo, with transport ranges of hundreds to thousands of kilometers. The downside is that unloading depends on the trailer type.
