Patent applications in the summary of the invention, such as A and B need to be connected, can be connected by argon arc welding, electric welding, etc. Can you write this?

This can be written in the specification, but the word "etc." It is not allowed to appear in the claims, which will lead to the uncertainty of the protection scope of the claims. In the process of writing claims, some related concepts can be adopted instead of examples of various embodiments according to the actual situation. In this case, argon arc welding and electric welding can be used to enhance the upper concept, a and b welding. If possible, it can be further lifted. Welding is a kind of fixed connection, which can be fixed by nuts and bolts or riveted, so it can be defined by the higher concept of "fixed connection". The above is for reference. There are many other professional problems in the process of writing the actual patent application documents. If you need help, you can contact my QQ33508862.