"1. Scope of application: buses, etc.
2. The new air duct with aluminum alloy profile structure has beautiful and elegant appearance, simple and bright appearance, long service life and good weather resistance. In particular, the air duct adopts lock-type fixing mode, which is convenient to disassemble and assemble, and is conducive to the installation and maintenance of bus air conditioning pipes and wire bundles; The advertising duct designed for public transportation has a large advertising area and is easy to replace. You can directly replace the advertising page without opening the duct. "Customize the product, and calculate the price according to the customer's design drawings and sales volume."