Anticorrosive wood Pinus sylvestris var.

Anticorrosive wood Pinus sylvestris var.

Douglas fir, Pinus sylvestris var.mongolica, Pinus sylvestris var.mongolica, Pinus sylvestris var.mongolica, Pinus sylvestris var.mongolica, which pine has high density, is well-known in the world for its excellent strength-to-weight ratio. Its high specific gravity can provide good nail-holding and fixing power, making it suitable for making houses and small commercial buildings. , Multi-story and industrial buildings. In North American softwood species, Douglas fir not only has a high modulus of elasticity, but also its external bending fiber stress, weave tension, transverse shear force, weave pressure, and weave pressure are all very good. Because of the physical properties of Douglas Fir, and the durability of the heartwood and outstanding physical stability, many construction companies around the world use Douglas Fir as the standard for judging all framed timber. Douglas Fir is famous for its structural properties and beautiful appearance. Douglas fir is the most commonly used type of wood when designing structures that require large wooden beams, long spans, or special-shaped arches (such as churches, bridges, and stadiums). Douglas fir charcoal wood has a longer life. Because douglas fir pine has strong corrosion resistance, it is superior to general corrosion resistance, making the use environment of the same Douglas fir charcoal wood longer than other charcoal woods. Douglas fir wood carbonized wood structure has stronger strength. We know that after carbonization