It was once thought that lead could be transmuted into gold.有人曾经认为铅可以变成黄金。They transmuted the raw materials into finished products.他们把原料变为成品.In former times it was thought that ordinary metal could be transmuted into gol...
This paper introduces the preparation, properties and application of the masterbatch.介绍母料制备, 讨论了母料性能与应用.The color deviation is a very important quality controlling index in producing plastics color masterbatch.色差是塑料色母粒制造...