polyphenyl造句

• Mdi testing methods for polymethylene polyphenyl polyisocyanate testing methods for polymeric mdi
  聚甲烯聚苯聚异氰盐酸的测试方法
• Application of polyphenyl insulating plate for frost protection of hydraulic project foundation
  聚苯保温板在水利工程基础预防冻害中的应用
• Occupational exposure limit for polymethylene polyphenyl isocyanate in the air of workplace
  车间空气中多次甲基多苯基多异氰酸酯职业接触限值
• A novel ring - enlargement oxidation of polyphenyl substituted cyclopentadienes in air ( or molecular oxygen ) promoted by perchloric acid was described , in which an oxygen atom was inserted into the cyclopentadiene - ring , forming a six - membered pyrylium salts
  摘要报导了空气（或氧气）存在的条件下，由高氯酸引发多苯基取代环戊二烯发生新颖的碳碳键断裂扩环反应，在此反应中，氧原子插人到环戊二烯环中形成相应的六元环吡喃盐类化合物。