Special vehicles generally have: 1. Oil tanker, steam tanker, liquid tanker. 2. Special water purification vehicles for clearing, sweeping, cleaning, lifting, loading and unloading (excluding dump trucks), lifting, mixing, excavating, bulldozing, refrigeration, insulation and other special motor vehicles. 3. Equipped with a fixed special instrumentation to engage in the professional work of monitoring, firefighting, money transport, medical, All kinds of special-purpose motor vehicles for TV broadcasting, etc. 4. Container tractors, etc.