求翻译：机器在运行之前，首先检查手具等外接器件的连接；机器在运行期间，不要自行拆卸机体，包括手具；关闭电源后，不要让非专业人员打开机箱防护盖，预防电击危险是什么意思？

(2) the machine is running, first check the hand tools and other external devices connected; the machine during operation, do not disassemble the body, including hand tools; power is off, do not let non-professionals to open the case protective cover to prevent risk of electric shock

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2. Machine before movement, first inspects has substandardly meets the component the connection; Machine in movement period, do not have to disassemble organism voluntarily, has including the hand; After closes the power source, do not have to let the layman turn on the engine case closure door, the

2. the machine before running the, first check the hand of substandard devices connection machine during run time, do not remove body on their own, including hand tools, shut down the power supply, do not open chassis protection covers make non-professionals, preventing the risk of electric shock

2. The machine is before the operation, the connection of connecting the device of having etc. of checking hands at first; The machine is during operation, don't dismantle the organism by oneself, including hands have; Close power, don't let layman case protective cover of opening etc., prevent from