overhead door operator

例句：

1. 1. The overhead door operator is responsible for opening and closing the overhead doors.
   门上方操作员负责打开和关闭门上方的门。
2. 2. The overhead door operator needs to be trained in emergency procedures.
   门上方操作员需要接受紧急程序培训。
3. 3. The overhead door operator must wear a safety helmet when operating the overhead doors.
   门上方操作员在操作门上方的门时必须戴安全头盔。