はじめに
Over time, regular use of the trumpet can lead to the degradation of the felt material. The stem felt can wear down from friction against the valve, deteriorate due to moisture from breath or saliva, or accumulate dirt or debris. Here is the process of replacing the stem felt in a trumpet's valve.
もう少しです!
To reassemble your device, follow these instructions in reverse order.
終わりに
To reassemble your device, follow these instructions in reverse order.