Most direct substitution of groups bound to an aromatic nucleus is limited to diazonium salts.大多数连于芳核能被直接取代的基团仅限于重氮盐.Severe steric effects at the reactive carbon would impede the substitution.大的立体效应阻止在碳上的取代.We use saccha...
Adopt the gantry multi - armed mechanically deferent manners, run fast.此款超声波采用龙门多臂机械输送方式, 运行快捷.Adopt the gantry multi - arms mechanically deferent manner, run steady.采用龙门多臂机械手输送方式, 运行快捷.Finally, numerical examples for de...