投影仪作为一种重要的办公设备，已经广泛的应用到了军事、教学、企业等多种部门。

As a important equipment of office which has been put in use in military affairs, education, companies, etc.

youdao

投影仪作为一种重要的办公设备，已经广泛的应用到了军事、教学、企业等多种部门。

As a important equipment of office which has been put in use in military affairs, education, companies, etc.

youdao