The physical properties of rubber accelerator 2 - mercapto benzothiazole and main methods for its preparation are introduced.介绍橡胶硫化促进剂 2- 巯基苯并噻唑的物理性质和主要的制备方法....
Pharmaceutical Industry for the production of Bicyclohexane Piperidine BENZTROPINE Dihydrobrohide, diphenhydramine hydrochloride salt.医药工业中用于生产双环己哌啶 、 苯甲托品氢溴酸盐,苯海拉明盐酸盐等....
闪电在货车周围炸开时，情景异常壮观。It was unbelievably dramatic as lightning crackled all round the van.为重现当时的情景，他们做了大量细致的工作。Elaborate efforts were made to reconstruct what had happened.白日梦可能像是真实情景的预演。Daydreams may seem to be rehearsals ...