Mechanical Equipment [Daily Question] Saturday, December 10, 2011

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Please hide your replies; editing after posting is ineffective! Those with different views on the provided answer keys can post discussions the next day. For multiple accounts under the same IP, only the first response counts as valid. This is a multiple-choice question: 5 points are awarded for answering it correctly, 3 points for selecting most of the correct options, and 2 points for the rest. There is a reward for everyone who participates. Please hide your reply; the method for doing this is: http://bbs.hcbbs.com/thread-492556-1-1.html. Multiple-choice question: The air valves in reciprocating compressors are one of the important components; they are divided into automatic and forced types, and are composed of ( ). A. Valve seat ； B、Sealing element ； C. Balance hole ； D、Lift limit switch ； E. Valve disc Answer: A B D E