To avoid electrical shock hazards, never operate the sewing machine with the ground wire for the power supply removed.
为了防止触电事故，卸下电源地线的状态，请不要运转缝纫机。 收藏。
To avoid electrical shock hazards, neither open the cover of the electrical box for the motor nor touch the components mounted inside the electrical box.
为了防止发生触电事故，请不要在打开电源的状态下，打开电气箱盖以及触摸电气箱内的零件。
Keithley products are intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury.
Keithley产品的用户应该具有合格资质，了解电击危险，熟悉避免可能伤害的安全防范要求。
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