Refers to the wood board material before bonding to remove the joints, rotten and other wood defects, so that you can produce less defects of materials, do small material for large use, inferior materials are superior use.Although refers to the wood is splicing type wood, but did not change the structure and characteristic of wood, it still retains the natural solid wood texture and beautiful, and mostly has the unique fragrance of natural wood, with better moisture absorption and air permeability characteristics.Refers to the connecting board in tensile and compression and other physical and