目的合成邻苯二甲酸二环己酯半抗原衍生物和合格的人工全抗原,探讨其制备方法.Objective To study the preparation and characterization of hapten and artificial antigen of dicyclohexyl phthalate....
提出一种新颖的双降压式交流斩波器.A novel bi - directional dual Buck AC chopper is presented in this paper.斩波器,将光依次切换到参比光路和样品光路, 四扇区设计可以提供样品测试和参比测试中分别测试暗电流, 增加准确性.Switches between sample and reference beam. Four - segment design provides...
The payments were funded by a use tax paid by food processors.这笔钱从粮食加工商交纳的使用税中支出.In contrast, out - of - state processors were required to submit title certificates or police certificates.可是州外的收集者却要提交特许证或警察发给的证书.Good exa...