技术员把新天线安装在屋顶上以获得更好的信号接收。

The technician ___mounted the new antenna ___on the roof for better signal reception.

安装在博物馆展示柜上的历史文件被精心保存。

The historical documents ___mounted ___on the museum display are carefully preserved.

你应该把架子支架安装到墙内的立柱上以支撑重物。

You should ___mount the shelf bracket ___onto a stud in the wall to support heavy items.