1. Foundry polyurethane binder comprises component Ⅰ, a polyhydroxy component whose main component is benzylic ether phenolic resin, component Ⅱ, a polyisocyanate, and a catalyst.
   铸造用的聚氨酯粘合剂主要有两组份构成，组份Ⅰ为多羟基化合物，如苯醚型酚醛树脂为主要成份；
2. A water soluble polyhydroxy derivative of1,4| diazine has been isolated from Panax pseudoginseng var notoginseng for the first time.
   从三七水溶性成分中首次分离得到一个多羟基吡嗪衍生物。

声明：以上例句、词性分类均由互联网资源自动生成，未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。