Polycarbonate Diols (PCD) are used for a wide range of polyurethane-based coating formulations, providing an extreme durability and a high performance to the final polymer. ok
In mathematics, a reciprocity law is a generalization of the law of quadratic reciprocity. There are several different ways to express reciprocity laws.
The Reciprocity Principle: Give Before You Take in Web Design. Summary: Humans tend to return good deeds: use this social psychology law in user interface design to gain usersâ trust and motivate engagement with your site or app.