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.
Reciprocity. (See also. .). ka me, ka thee Do a good deed for another and the favor will be returned. This expression appeared in print as early as the mid-16th century. The exact origin is unknown and many variants were used interchangeably with ka, such as kaw, kae, k, kay, and kob.