What are the types of wooden doors?

Solid wood is divided into many kinds, beech, elm, ash, oak, pine, fir, salwood, camphor wood, etc., the domestic use of the common is oak. Pine, fir worse, ash, beech, elm belongs to the middle of the upper, in the upper is the mahogany series. The advantage of oak is corrosion resistance. And the advantage of pine and fir is that the price is a little lower. In addition, the physical properties of solid wood are not stable, and it is not easy to do modeling. We can smell when we buy whether there is a pungent odor, for formaldehyde excess furniture we can not buy.