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.
Under the terms of the Elgin-Marcy treaty [more commonly known as the Reciprocity Treaty of 1854], the United States and the British North American colonies (Canada, New Brunswick, Nova Scotia, Prince Edward Island, and Newfoundland) each removed the duties upon a considerable list of natural products.eciprocity and Canada. [This article was written in 1948. For the complete citation, see the end of the text.]. Reciprocity, a term commonly used in Canada in reference to an agreement with the United States involving mutual reductions in customs duties.