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【Pump Technology Edition Daily Question】January 21, 2020 (Spring Festival bonus: 10 wealth points for those who answer correctly before the answers are revealed)

2020-01-21View Original

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80. In chain drive, as the teeth of the sprockets gradually wear out, the pitch increases and the chain wears more rapidly; when the wear becomes severe, it is necessary to (). A. Adjust the center distance of the sprockets. B. Replace individual links. C. Replace the sprockets and chain. Answer to yesterday’s question: B. 79. The marking for wear-resistant hydraulic oil products is (B).  A、L-HL32  GB11118 B、L-HM32  GB11119 C、L-AN32  GB443 (Answers are released the day before they are made public; a reward of 10 wealth points is given for correct answers before publication, 5 wealth points for correct answers after publication, and 3 wealth points for simply participating)

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