方法: 用浑浊法测定体系的分层曲线,自动电位滴定仪测定平衡两相中醋酸的含量,通过绘制出的三元相图,筛选萃取剂.Methods: Using the turbidity method and analyzing the acetic acid concentration of both phases at equilibrium....
台钳上有刻痕的虎钳牙帮助它紧咬住工件.The scored jaws of a vise help it bite the work.工件已经上了车床.The workpiece is already on the lathe.我们只是用磨床将工件抛光和精加工.We used grinding machines only to smooth and finish a workpiece....