A swivel joint is a connection that allows a connected object, such as a gun, chair, swivel caster, or anchor, to rotate horizontally or vertically.Rotary design[edit]A common design for a swivel is a cylindrical rod that can rotate freely within a support structure. The rod is usually prevented fro

The installation of various air duct components and operating mechanisms should be able to ensure their normal use functions and be easy to operate.

The air source of the air-conditioning system​ can be divided into two categories, one is the hot air flow drawn from the aircraft system, which enters the cabin under the action of the air-conditioning components; the other is the ram air from the outside, which is mainly used to cool the air from the aircraft system. The gas introduced to the air conditioning unit is discharged directly after use.