求翻译：在使用前要检查其外壳、手柄、负荷线、插头、开关等安全可靠性能是否良好，使用前要进行空载检查、运转正常。手持电动工具只在设计用途上使用。是什么意思？

Before use to check its shell, handle, load lines, plugs, switches and other safety reliability is good, checked before use to conduct no-load, in normal operation. Only hand-held power tools used in design purposes.

Before they can be used to check its shell, handle and load line, plugs, switches, and other security and reliability is good, can be carried out prior to use empty inspection, normal operation. Only hand-held power tools in the design used for any purpose.

Must inspect its outer covering, the handle, the load line, the plug, the switch before the use and so on the safe reliable performance is whether good, before the use must carry on the idling inspection, the revolution is normal.Grasps the power tool only to use in the design use.

Before using to check its casing, handle, load line, plug, switch is good security and reliability before use to no load inspection, functioning. Handheld power tool designed purposes only use.

Before use to check its casing, handle, load lines, plugs, switches, such as security and reliability is good, no load check before use to, and working properly. Hand-held power tools used only on the design uses.