求翻译：物业工程部将于2012年5月28日开始对园区已入住业主家中投入使用的水电设备设施系统及相关的电源、水源等进行一次预防性安全检测及维护是什么意思？

Property engineering department began on May 28, 2012, the park has to stay put into use in the owners' home in hydropower equipment and facilities systems and related power, water, etc. to carry out a preventive safety testing and maintenance

Property Engineering Department will May 28, 2012 start of the park owners have been in use in the home of the electricity and water systems and related equipment, and facilities for water, power, and a preventive safety tests and maintenance

The property engineering dept will start in May 28, 2012 to the garden area to enter industry in the host family the operational water and electricity equipment facility system and the correlation power source, the water source and so on carries on a time preventive security examination and the main

Property Engineering Department began on May 28, 2012 Park has admitted to owners of hydropower equipment put into use in facility systems and related power supply, water conduct a preventive safety inspection and maintenance

正在翻译，请等待...