DHI web servers may automatically log aggregate information, such as a user's IP address, domain name, browser type, date and time of access, and other log file data.
DHI网络服务器可能会自动地记录汇总信息，例如用户的IP地址、域名、浏览器类型、访问日期和时间，以及其它日志文件数据。
The time domain IP does not require very high relative precision of potential difference, but the supply current is large and the equipment is cumbersome.
时间城激电对电位差的相对精度要求不高，但供电电流大，装备笨重。变频法对电位差的相对精度提出了很高的要求，在极化率低时，难于达到。
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