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English Translations » 历史存档[信息] » Regarding the issue of vacuum level

Regarding the issue of vacuum level

2015-07-14View Original

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I would like to ask what does the commonly mentioned vacuum level of 10 mm of mercury mean? Is it 10 mmHg lower than atmospheric pressure, or 10 mmHg of absolute pressure? Experts, please help answer. Thank you!
Reply #22015-07-14
Vacuum degree refers to a pressure lower than atmospheric pressure, that is, negative pressure (gauge pressure).
Reply #32015-07-14
10 mmHg lower than the atmospheric pressure at the measurement site.......
Reply #42015-07-15
A pressure 10 mmHg lower than the local atmospheric pressure at that time

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Translated at 2026-07-21 02:03:49

Original: https://bbs.hcbbs.com/thread-1419731-1-1.html

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