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。
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。
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.
文章介绍了PC - E500用于沉降变形监测外业数据采集程序的主要功能和特点，设计思路以及使用中的注意事项。
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