The company's rotorcraft possess so-called "patent purity".
该公司的旋翼飞机拥有所谓的“专利纯洁”。
According to synthesis and isolation of US patent, its purity cannot meet the requirement of pharmacopoeia.
由于美国专利合成与提纯方法过于简单且产率较低，纯度达不到医药级纯度。
According to synthesis and isolation of US patent, its purity cannot meet the requirement of pharmacopoeia.
由于美国专利合成与提纯方法过于简单且产率较低，纯度达不到医药级纯度。
应用推荐