In addition to spesifications wich must be followed by users, there are recommendations, advices of producers,
For example they recommend to use original spare parts or special trade mark , that is not a must but just a Recommendation, since they can not compulse user but only advice for better /utmost efficency of their product.
( But if Recommendation = spesification in spanish or there is wide spread usage in such a way I may not know this )
Local time: 01:21
Native speaker of: Turkish
PRO pts in pair: 86