There are many kinds of material
The texture is very light, soft, absorb water, grip nail difference, easy to dry, made of the plate in the course of the use of water evaporation, the plate is easy to dry deformation.
The pine texture hard, difficult to suppress, stitching structure is not good, nail grip force difference, deformation coefficient.
There are many kinds of wood, such as poplar, birch, pine, paulownia, etc., of which the poplar,
birch for the best, dense texture, wood is not soft not hard, strong grip nail, not easy to deformation
