求翻译：进行设备维护、修理或清洗时，必须关闭主电源开关，并警示，保证非操作人员不能接触开关。在检查控制系统前必须关闭电源。在检修气、液元件时必须关闭相关设备的所有的阀门并卸荷。一般设备要在不带电、不带压下检修。是什么意思？

Equipment maintenance, repair or cleaning, you must turn off the main power switch and warning to ensure that the non-operators can not touch the switch. Check the control system must be off. Maintenance of gas, liquid components associated equipment must close all the valves and unloading. General

Equipment Maintenance, Repair or clean, you must turn off the main power switch, and warning, and ensure that non-operator should not touch switch. In the control system must be powered off. In the gas and liquid element must be turned off when the equipment all the valves and unloading. General dev

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For equipment maintenance, repair or cleaning, you must turn off the main power switch and warning to ensure non-operators cannot switch. You must turn off the power before you check the control system. Inspection and repair, liquid cell must close all valves and associated equipment when unloading.

When carries on the maintenance of equipment, the repair or the clean, must close the main power switch, and the police shows, guarantees the non-operator not to be able the contact switch.Must close the power source in front of the inspection control system.When overhaul gas, fluid part must close