The present invention is to form a three-layered thermal insulation film in order to uniformly obtain the amount of sunshine of various horticultural crops cultivated in the greenhouse, and to increase the effect of thermal insulation, and also to make the installation of the greenhouse simple and easy. It is related to the triple-greenhouse, which has been built so that the maximum amount of sunshine can be obtained, especially for horticultural crops grown in the greenhouse, as well as to increase the effect of keeping warm, to facilitate ventilation, and to provide uniform sunlight. In addition to making it possible to demonstrate the robustness of the greenhouse and the installation work of the greenhouse is easy and easy.
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