How to ensure that the plastic film in the greenhouse is not damaged

Greenhouse, also known as greenhouse. A facility that can transmit light, keep warm (or heat up), and is used to cultivate plants. In the season unsuitable for plant growth, it can provide greenhouse growth period and increase yield, and is mainly used for cultivation or seedling raising of warm vegetables, flowers, trees and other plants in low temperature season. There are many kinds of greenhouses, depending on different roof truss materials, lighting materials, shapes