墙上安装 meaning in English

wall mounting

When the hooks have to be installed on the wall , nails or screws should be first installed on the appropriate positions
当需要在墙上安装挂钩时，钉匀或螺丝应先安装于相对的位置。
No air - conditioning or other units shall without the prior written consent of the manager be installed through any window or external wall of the building other than at places designated for such purpose and all possible measures shall be taken to prevent excessive noise , condensation or dripping on to any part of the land and the building
除在特别指定的地方外，不得在未有经理人事先书面同意下于任何窗户或发展项目的外墙上安装任何空调或其他设备，并须采取所有措施以防止过多噪音或水份凝聚或滴到该地段及发展项目的任何部份。