一次扫描时间（one scan time）就是PLC执行以上所列的3个步骤所需的时间。
基于20个网页-相关网页
one scan time
一次扫描时间
以上为机器翻译结果，长、整句建议使用 人工翻译 。
You can get a one-time scan of most ports free, and more thorough scans for a sliding fee.
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Extending the UnNap Nap To make the UnNap Nap as close to a nap as possible, do a mental scan of the body, focusing on different muscle groups one at a time, stopping at any that are feeling tense.
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