plug-in type relay

例句：

1. 1.The plug-in type relay is a popular choice for many home automation systems.
   这种插件式继电器是许多家庭自动化系统的首选。
2. 2.The new plug-in type relay has improved reliability and reduced power consumption.
   新型的插件式继电器提高了可靠性并降低了功耗。
3. 3.The plug-in type relay is easy to install and maintain, making it ideal for small businesses.
   插件式继电器易于安装和维护，非常适合小型企业。