Load-bearing element

The load-bearing member include two spaced face plates and at least two weight-bearing components between two spaced face plates, said weight-bearing component is partially fixedly-connected to the ajacent face plate, and between of weight-bearing components and between of weight-bearing components and face plate are formed into receiving spaces, so that the above-mentioned structure can make load-bearing member possess high compression strength and stretching resistance, and can be extensively used in various walls, floor slab and pavement.

Load-bearing element

Low heat consumption multi-layer air vessel plastic cloth

The present invention is one kind of farm mulching material with low heat loss, low cost and long service life. The farm mulching plastic material includes at least three layers of separated first base film and the second base film layers set between adjacent first base film layers. One of the second base film layer between two layers of the first base film defines several first gas chambers separated from each other and filled with inert gas, while the other second base film layer define several second gas chambers separated from each other and filled with greenhouse effect gas. The first gas chambers in the same layer form at least one heat blocking layer, and the second gas chambers in the same layer form at least one heat effect layer.