Cada una de las estructuras sintácticas de S+P incluidas en una unidad superior es denominada como:

Each of the S + P syntactic structures included in a higher unit is called:

Explanation:

when you are going to explain a procedure,   the first thing to do is to name the parts or the apparatus you are going to describe in terms of how it or they function. also it is important to know who is going to operate it and the abilities this man/woman requires to manage it.