I have a question: What are the correct answers to the following multiple-choice question?

2022-11-23View Original

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I have a question: What are the correct answers to the following multiple-choice question?

Reply #22022-11-23

The question itself is wrong; seal units installed in series are not designed for use with negative pressure at the inlet or within the seal chamber

Reply #32022-11-24

Hello, I saw this question on the Internet. Specifically, I don’t understand either. Here is the website address: https://www.shangxueba.cn/6873358.html

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