Keithley products are intended foruse 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。
2
It is up to you to take precautions to ensure that whatever you select for your use is free of such items as viruses, worms, Trojan horses and other items of a destructive nature.
阁下必须自行采取必要措施，以确保你所点选的网站内容是没有病毒、寄生虫、木马程序与其他有害内容。
3
The paper introduces a PC-E500program for settlement observation field data col-lection, including its main functions and features, programing processes and several precautions in use.