The air film closing angle is a more important part in the installation of the air film, and the last corner closing requires mechanical force to stretch.

The matters needing attention are: first, the membrane must be protected to avoid damage to the membrane due to excessive force; second, professional tools must be used, such as fixing the reinforcing part of the edge of the membrane with a special clamp for the gas membrane, using a hand hoist, etc. The labor-saving tool is connected to the special splint of the gas film for stretching, which can greatly improve the efficiency.