relay-type recording instrument

机械... ... relay yoke 继电器轭 relay-type recording instrument 继电器式记录仪表 release bearing 分离轴承，离合器分离轴承 ...

... relay-type recorder 继电器式记录器 relay-type recording instrument 继电式自记仪表 relay unit 继电器单元，继电器组 ...