Noise damping foam products: car door plate, underbody, trunk, an engine case, roof, die-cutting products for dashboard, noise reduction, headline.

The utility model discloses a seal door of engine case type integrated test system, which comprises a door body, inflatable seal strips are arranged around the door body.

This paper explains the character of tool materials, tool geometry and small combined boring tools for machining aluminum alloy on the basis of the practice and research.