Before the completion of work, the service engineer isn't allowed to leave the site or without the permission of the customer.

故障未处理完毕，服务工程师不能离开现场。离开现场需得到顾客许可。

youdao

Before the completion of work, the service engineer isn't allowed to leave the site or without the permission of the customer.

故障未处理完毕，服务工程师不能离开现场。离开现场需得到顾客许可。

youdao