维修和使用 meaning in English

maintenance and service

Drain and sewer systems outside buildings - maintenance and operations
室外建筑物的排水和污水系统.维修和使用
Gravity drainage systems inside buildings - installation and testing , instructions for operation , maintenance and use
建筑物内部的自流排水系统.安装和检验操作维修和使用的说明
Heating systems in buildings - procedure for the preparation of documents for operation , maintenance and use - heating systems not requiring a trained operator
建筑物的供暖系统.操作维修和使用的文件编制程序.无需经培训人员操作的供暖系统