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【Daily Question No. 329】2018.12.01

2018-12-01View Original

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【Daily Question No. 329】December 01, 2018: A reciprocating pump operates by reciprocating through ( ), thereby changing the volume inside the cylinder and achieving the purpose of transporting liquids. Multiple choice: A. Bearing B. Valu C. Theory D. Piston. D is correct; 3 correct answers, 1 incorrect answer ; Mass posting of posts – rated based on the lowest score ; Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below

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