Having been engaged in the field of woodworking for many years, there are always people who feel confused about the identification of wood panels When I introduce myself to others, it usually takes a lot of effort to make my knowledge of the board clear to me. Yes, you read it right! Only speak clearly to yourself. Whether the other party clearly understands it depends on God's will. Sometimes, it's too difficult for someone who hasn't come into contact with something to make him understand it instantly. Our usual practice is to use metaphors to explain professional things to unfamiliar people. For example, what is the difference in diameter between Venus and Jupiter? If we say that Venus has a diameter of 12104 kilometers, and Jupiter has a diameter of 142984 kilometers. Jupiter is 130880 kilometers larger than Venus, with a difference of nearly 12 times.