Everybody on board was worried and we were eager a Everybody on board was worried and we were eager and ____ to find out what had h 分类:河南理工大学-机械设计制造及其自动化-可编程控制器 题型:选择题 查看答案
R是( )A.A常开继电器B.常闭继电器C.触发触点D.启动触点 R是( )A.A常开继电器B.常闭继电器C.触发触点D.启动触点 分类:河南理工大学-机械设计制造及其自动化-可编程控制器 题型:选择题 查看答案