indicator control meaning in English

转向灯开关

The design of esp digital indicator controled by the microcontroller
微机型电除尘数显装置的设计
Direction indicator control
转向指示器操纵件
Corrosion mechanism and indicator control for co2 in injection waters of jianghan oil region
江汉油区注入水中二氧化碳腐蚀与指标控制
Telecommunications - message waiting indicator control and notification supplementary services and associated switching and signaling specifications
电信.信息等待指示符控制和通知补充服务以及相关转换和信令规范