(教 材 P50/4.2) A.持有审计客户的股票卖空权 m anipulat or control mode and pr ogrammable controll ers introduction 2.1 Sele ct di scussi on wit h manipulator contr ol 2.1 .1 cla ssification of control relay s and dis crete ele ctroni c cir cuit ca n co