... low cost, practical, artistic, fashionable and durable; What's more, can reduce the pollutions to the environment. 1) It ... stability. 2) Also use few materials, and can be used several times that is can be recycling, so it ... has a long life-span up to 50years for use. At the same time, due to the materials ... effect, which saving a lot of energies. 4) What's more, it used widely, such as monolayer workshop ...