laser alarm installation

例句：

1. 1. The policedepartment has installed a new laser alarm system in the downtown area to improve safety.
   警察局在市中心安装了新的激光报警系统，以提升安全性。
2. 2. The construction site was equipped with a laser alarm installation to prevent accidents during construction.
   施工现场配备了激光报警装置，以防止施工过程中发生事故。
3. 3. The company has installed a laser alarm installation at its headquarters to monitor employee activity and ensure security.
   该公司在其总部安装了激光报警装置，以监控员工活动并确保安全。