Before operating an instrument, make sure the line cord is connected to a properly grounded power receptacle.
在操作仪器之前，请确保电源线被连接到具有适当接地的电源插座。
2
In order to avoid accident, don't touch the critical part of the equipment, including the power cord of the electric stove, the switchboard, the adjustment instrument and so on.
设备危险区如电炉的电源导线、配电屏、调整仪表等不得随便触动，以免发生事故。
3
The headphones are complemented by an attractive "kind of blue" cord and uniquely designed "musical instrument" carry case.