Trombone is a brass instrument. It has a long history. This instrument was first made in the mid-15th century. In the 18th century, trombone was played at the church, so it is a sacred instrument. It is called the God’s instrument. People who play the trombone change the pitch by moving the slide. This is a charactaristic that other instruments do not have. When I saw this instrument for the first time, I was interested in the structure of the instrument, so I decided to play it in brass band club. One day, my friends who were not members of brass band club were interested in this instrument and they asked me about the structure of this instrument. They said “How do you assemble it?” I think many people may be interested in it, too. They can understand the structure of this instrument if they know how to prepare to play the trombone, so I decided to introduce this procedure. 《List of tools》 ・A instrument ・A mouthpiece ・A piece of gauze (to wipe dirt) ・Slide cream: about 2...