可以直接在外部的内存设备(SD卡)上安装应用，还可以将应用从内部迁移到SD卡上，反之亦然。
Apps can be installed directly on an external memory device (SD card). They can also be move from internal memory to the SD card and back.
吊顶内部设备、管道的安装、检修空间不够。
Space for equipment and pipes in the ceiling is not sufficient for installation and maintenance.
目前这些设备中许多都具有与外部天线相对的内部天线，其安装在设备外壳内。
Many of these devices now have internal antennas which in contrast to external antennas, are installed within the housing of the devices.
目前这些设备中许多都具有与外部天线相对的内部天线，其安装在设备外壳内。
Many of these devices now have internal antennas which in contrast to external antennas, are installed within the housing of the devices.
应用推荐