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One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points; August 27th

2016-08-27View Original

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Multiple-choice question: The valve that is usually installed in series with a globe valve on the pipeline leading out of the container, and which has a special structure and purpose is: ( ) A. Check valve B. Control valve C. Safety valve D. Emergency shut-off valve Answer: D, Emergency shut-off valve

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