Car carrier semi-trailers, also known as vehicle transport semi-trailers, are specialized semi-trailers designed for transporting various types of vehicles, including passenger cars and commercial vehicles. They are widely used in automobile manufacturing, logistics, and used car trading.

A side-tipping self-dumping semi-trailer is a specialized transport vehicle that uses a hydraulic system to tilt the cargo box to one side, thereby automatically unloading goods. It is widely used for transporting bulk goods such as coal, sand, grain, and building materials.

A dump semi-trailer is a heavy-duty bulk cargo vehicle, with a reinforced steel cargo box and a hydraulic lifting system as its core structures, mounted on a rugged chassis with heavy-duty axles and a stable suspension system. The cargo box features high wear resistance to handle gravel, ores and construction waste, while the hydraulic system enables fast rear or side tilting for efficient unloading. It also has safety locks to prevent accidental tilting during transportation.

A tanker semi-trailer is a specialized vehicle for liquid transport, consisting of a sealed cylindrical tank, heavy-duty chassis, loading/unloading system, and safety devices. The tank is made of corrosion-resistant steel or aluminum alloy, with internal anti-wave baffles to reduce liquid sloshing during transit. Critical safety components include emergency shut-off valves, pressure relief valves, and static grounding devices to prevent leaks and explosions. It also has reinforced axles and stable suspension for heavy-load transportation.

A box semi-trailer is a closed freight vehicle with a rigid rectangular cargo box as its core structure, mounted on a heavy-duty steel chassis with reinforced axles and a stable suspension system. The box is made of corrosion-resistant steel or aluminum alloy panels, fitted with airtight rear roll-up doors or side access doors for easy loading and unloading. It also has anti-theft locks, cargo tie-down rails, and waterproof seals to protect goods from external damage and theft.

A flatbed semi-trailer is a versatile heavy-haul vehicle with a flat, open steel platform as its core structure, mounted on a reinforced chassis with heavy-duty axles and a robust suspension system. It is equipped with side rails, removable stakes, and multiple tie-down points to secure diverse cargo; some models add liftgates or crane mounting brackets for easier loading and unloading. Its low-profile design ensures stability even when carrying oversized items.

A refrigerated semi-trailer is a specialized temperature-controlled freight vehicle, consisting of an insulated cargo compartment, a high-efficiency refrigeration unit, a heavy-duty chassis, and a temperature monitoring system. The compartment is built with heat-insulating panels and a sealed door to maintain stable internal temperatures, while the refrigeration unit can cool or heat goods as needed. It also has anti-slip flooring, cargo tie-down rails, and emergency temperature alarms for safe transport.

A skeleton semi-trailer is a lightweight, frame-type transport vehicle, featuring a heavy-duty steel beam chassis as its core structure, with fixed locking pins and twist locks to secure containers. It has no enclosed cargo box, only a reinforced skeletal frame equipped with durable axles, a stable suspension system and a traction pin for connecting to tractors. Its streamlined structure ensures low self-weight while maintaining high load-bearing capacity for standard containers.

A bulk powder semi-trailer is a specialized vehicle for transporting dry powder materials, consisting of a sealed cylindrical tank, a heavy-duty chassis, a pneumatic conveying system and safety devices. The tank is made of high-strength steel or aluminum alloy with internal fluidized beds to facilitate powder discharge; the pneumatic system uses compressed air to push materials out, enabling fast and residue-free unloading. It also has pressure relief valves, anti-static devices and secure manholes to ensure transportation safety.

A lowboy semi-trailer is a heavy-duty transport vehicle designed for oversize and overweight cargo, with its core structure featuring a lowered central load bed that sits close to the ground, minimizing the overall height of the loaded goods. It consists of a reinforced steel chassis, heavy-duty axles, a hydraulic ramp system for easy loading and unloading, and sturdy tie-down points to secure cargo. The detachable gooseneck design allows front-loading of large equipment, while the robust suspension ensures stability on rough roads.

The semi-open cargo trailer is a type of freight vehicle with a frame structure design. The sides and rear are fitted with retractable or liftable fence-like panels (usually made of steel or aluminum alloy), and the top can be equipped with a waterproof tarpaulin or a hard roof. This type of vehicle combines the safety of a closed cargo box with the loading and unloading convenience of an open cargo box. It is suitable for transporting agricultural products, daily necessities, building materials, and other goods that require ventilation, moisture protection, and rapid loading and unloading, making it one of the main vehicle types for urban and rural logistics and agricultural product transportation.