Can one specification be used in three patented specifications at the same time?

Applying for three patents shows that the contents of patent protection are different, and the methods, technologies, products and shapes involved are different. Do you think it is appropriate to use the same specifications?

Supplement: Since the same product is protected by three patents, the instructions are easy to write. For subcomponent 1, write the contents of subcomponent 1. Sub-component 2, focusing on the contents of sub-component 2; You only need to mention the original product a little, and the patent claim points of the parts can be written, so that the instructions are easier to write. In the patent case we represent, the same product is protected by multiple technical points, and the instructions are written separately.