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A trailer jack is a professional lifting and supporting tool specially designed for trailers and semi-trailers. Different from ordinary car jacks, it features a higher rated load, a more stable base structure and interfaces that are better adapted to trailer chassis.It is widely used in scenarios such as trailer maintenance and tire replacement, traction docking, and outdoor operation support.

From the perspective of upstream industries, the main raw materials for the automotive wire harness industry are wires, terminals, sheaths, and seals, involving materials such as copper, rubber, and plastics. Prices are primarily determined by the market prices of commodities such as copper, petroleum, natural rubber, and other chemical materials.

Wiring harnesses are divided into high-voltage and low-voltage harnesses. Gasoline-powered vehicles only have low-voltage harnesses, powered by the battery, with power distribution handled by a fuse box. High-voltage harnesses are more commonly found in new energy vehicles.

To determine if a trailer wiring harness is waterproof, you need to verify it from 3 aspects-protection rating, structural design, and material selection.

​A family car, less than 5 meters long and only 1.5 meters wide, contains a 5-kilometer-long wiring harness, weighing about 5% of the car's weight, or approximately 25 kilograms. This harness wraps around the car 384 times, connecting 20,000 to 30,000 parts and bearing the core responsibility of power supply and signal transmission.

The all-new CTZ-65 mid-bass speaker makes its grand debut, delivering an immersive auditory feast for music lovers with its precise acoustic tuning and high-end materials. This 6.5-inch core unit, with its superior performance parameters and meticulous craftsmanship, is an ideal choice for upgrading car audio systems and building home audio systems.