They can qualify like contracts per adhesion, compared to which exists the need of the specific approval writing of the clauses vexatious, and these of the clause twisted, only those structures negotiations destined a regular if a if rie indefinite of relationships, so much from point of vision substantial (if, ie, predisposed by a contractor that expresses activities contractual at the address a a plurality undifferentiated of subjects), from point point formal view (where, , predeterminine te in content a half of modules or formulars usable in series), while they cheer from this category I contracts prepared from one of the two contractors in forecast and reference ad one single, specific story negotiation, compared to the other Ntrante can, of the all legitimately, request ED make the necessary changes after have freely appreciated the content, as, a greater reason, those in the shop it is state concluded at followed e for effect negotiations between parts.