【Pump Technology Edition: Daily Question】January 28, 2020 (Spring Festival bonus: 10 Wealth points for those who answer correctly before the answers are revealed)

2020-01-28View Original

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87. When installing the directional control valve, it is necessary to grind the spool of the valve body, and the clearance between its components must be strictly controlled to within ( ) mm. A、0201 B、0215 C、0202 D、02015 The answer to question 86 will be announced tomorrow. 86. A relief valve is used to regulate the constant pressure in a hydraulic system ( ). A. Pressure B. Flow rate C. Velocity D. Direction (Answers are released the day before they are made public; 10 wealth points are awarded for correct answers before the release, 5 wealth points for correct answers after the release, and 3 wealth points for participation.)

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【Pump Technology Edition: Daily Question】January 28, 2020 (Spring Festival bonus: 10 Wealth points for those who answer correctly before the answers are revealed)

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